¿Alguna vez te has preguntado cuándo usar "to do" vs... Show more
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138
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21 Jan 2026
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Alexandre
@alexandre_pwim
¿Alguna vez te has preguntado cuándo usar "to do" vs... Show more






While es súper útil para conectar dos acciones que pasan al mismo tiempo. Piénsalo como el "mientras" en español - une actividades simultáneas donde una suele ser el trasfondo de la otra.
Tiene dos usos principales: mostrar tiempo simultáneo ("While he was talking, he was holding his baby") y contraste ("While some fathers feel awkward, he doesn't"). En el primer caso, las dos acciones ocurren juntas; en el segundo, while significa "aunque" o "mientras que".
La clave está en que after while normalmente usas verbos que expresan duración - acciones que se prolongan en el tiempo, no momentos puntuales.
💡 Truco: Si puedes reemplazar "while" por "when" sin cambiar el sentido, estás hablando de tiempo. Si suena mejor "although", es contraste.

El infinitivo se usa en situaciones específicas que puedes memorizar fácilmente. Siempre va después de ciertos verbos como forget, help, choose, expect, promise y decide ("I forgot to close the window").
También aparece después de adjetivos como happy, sad, surprised ("I was happy to help them"). Esto incluye construcciones con "too + adjective" ("too cold to swim") y "adjective + enough" ("strong enough to lift it").
Usa el infinitivo para responder "why" - para expresar propósito ("Why did you stop? To spend time with family").
💡 Recuerda: Después de adjetivos, SIEMPRE infinitivo. Es una regla sin excepciones que te salvará en los exámenes.

El gerundio tiene tres usos principales que son bastante lógicos. Primero, cuando el verbo actúa como sujeto de la oración .
Segundo, siempre después de preposiciones . Tercero, después de verbos específicos como enjoy, avoid, mind, finish y give up ("I dislike getting up early").
Los verbos más comunes con gerundio incluyen: like, love, hate, enjoy, miss, mind, finish, practise, suggest, can't help, admit, avoid, consider. Memoriza esta lista porque aparece constantemente.
💡 Truco fácil: Si hay una preposición (in, on, at, of, for, without), usa gerundio. Nunca falla.

Algunos verbos son tramposos porque cambian completamente de significado según uses infinitivo o gerundio. Con stop: "I stopped to have a beer" (paré para tomar una cerveza) vs "I stopped drinking beer" (dejé de beber cerveza).
Try también cambia: "tried to lift" (intenté algo difícil) vs "try closing the window" (prueba a ver si funciona). Con remember/forget: infinitivo para cosas que debes hacer, gerundio para memorias del pasado.
Need es especial: "I need to work" (tengo que trabajar) vs "This room needs painting" .
💡 Súper importante: Estos verbos aparecen mucho en exámenes. Practica con ejemplos hasta que el cambio de significado te suene natural.

Go on merece atención especial porque es muy común pero confuso. Con infinitivo expresa cambio de actividad: "After winning the Cup, Valencia went on to win the Champions League" (pasaron a ganar otra cosa diferente).
Con gerundio significa continuar la misma actividad: "They went on complaining all evening" . Esta diferencia es clave para sonar natural en inglés.
La lógica es simple: infinitivo = nueva actividad, gerundio = misma actividad continúa.
💡 Tip de memoria: Piensa "go on TO something new" vs "go on DOING the same thing". Te ayudará a elegir la forma correcta automáticamente.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Alexandre
@alexandre_pwim
¿Alguna vez te has preguntado cuándo usar "to do" vs "doing" en inglés? Esta guía te explica las reglas clave para dominar el infinitivo y el gerundio, además de cómo usar "while" correctamente. También descubrirás algunos verbos tramposos que cambian... Show more

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While es súper útil para conectar dos acciones que pasan al mismo tiempo. Piénsalo como el "mientras" en español - une actividades simultáneas donde una suele ser el trasfondo de la otra.
Tiene dos usos principales: mostrar tiempo simultáneo ("While he was talking, he was holding his baby") y contraste ("While some fathers feel awkward, he doesn't"). En el primer caso, las dos acciones ocurren juntas; en el segundo, while significa "aunque" o "mientras que".
La clave está en que after while normalmente usas verbos que expresan duración - acciones que se prolongan en el tiempo, no momentos puntuales.
💡 Truco: Si puedes reemplazar "while" por "when" sin cambiar el sentido, estás hablando de tiempo. Si suena mejor "although", es contraste.

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Improve your grades
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El infinitivo se usa en situaciones específicas que puedes memorizar fácilmente. Siempre va después de ciertos verbos como forget, help, choose, expect, promise y decide ("I forgot to close the window").
También aparece después de adjetivos como happy, sad, surprised ("I was happy to help them"). Esto incluye construcciones con "too + adjective" ("too cold to swim") y "adjective + enough" ("strong enough to lift it").
Usa el infinitivo para responder "why" - para expresar propósito ("Why did you stop? To spend time with family").
💡 Recuerda: Después de adjetivos, SIEMPRE infinitivo. Es una regla sin excepciones que te salvará en los exámenes.

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Improve your grades
Join milions of students
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El gerundio tiene tres usos principales que son bastante lógicos. Primero, cuando el verbo actúa como sujeto de la oración .
Segundo, siempre después de preposiciones . Tercero, después de verbos específicos como enjoy, avoid, mind, finish y give up ("I dislike getting up early").
Los verbos más comunes con gerundio incluyen: like, love, hate, enjoy, miss, mind, finish, practise, suggest, can't help, admit, avoid, consider. Memoriza esta lista porque aparece constantemente.
💡 Truco fácil: Si hay una preposición (in, on, at, of, for, without), usa gerundio. Nunca falla.

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Improve your grades
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Algunos verbos son tramposos porque cambian completamente de significado según uses infinitivo o gerundio. Con stop: "I stopped to have a beer" (paré para tomar una cerveza) vs "I stopped drinking beer" (dejé de beber cerveza).
Try también cambia: "tried to lift" (intenté algo difícil) vs "try closing the window" (prueba a ver si funciona). Con remember/forget: infinitivo para cosas que debes hacer, gerundio para memorias del pasado.
Need es especial: "I need to work" (tengo que trabajar) vs "This room needs painting" .
💡 Súper importante: Estos verbos aparecen mucho en exámenes. Practica con ejemplos hasta que el cambio de significado te suene natural.

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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Go on merece atención especial porque es muy común pero confuso. Con infinitivo expresa cambio de actividad: "After winning the Cup, Valencia went on to win the Champions League" (pasaron a ganar otra cosa diferente).
Con gerundio significa continuar la misma actividad: "They went on complaining all evening" . Esta diferencia es clave para sonar natural en inglés.
La lógica es simple: infinitivo = nueva actividad, gerundio = misma actividad continúa.
💡 Tip de memoria: Piensa "go on TO something new" vs "go on DOING the same thing". Te ayudará a elegir la forma correcta automáticamente.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user