Aprende el inglés auténtico de libros y películas.

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Errores frecuentes

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Look! Two boys are fighting.
Look! Two boys fight.

We also use the present continuous for the future when something is pre-arranged or expected with some certainty: Lorna is arriving tomorrow at six. Tom and I are eating out tonight

I've been at this school two years.
I'm at this school two years.

Use the present perfect (and not the simple present) for an action begun in the past and continuing into the present. I've been at this school two years means I'm still here.

I understand the lesson now.
I'm understanding the lesson now.

As a rule, verbs denoting a state rather than an act have no continuous forms, like understand, know, believe, like, love, belong, prefer, consist, mean, hear, see, etc.

If he'll ask me, I will stay.
If he asks me, I will stay.

Use the present tense in a future conditional in the if clause and the future tense in the main clause

But the future tense may be used in an if clause expressing a request: If you will/'ll give me some money I will/'ll buy you a drink.

Sir, to go home to get my book?
Sir, may I go home to get my book?

The infinitive simply names an action without reference to person, number or time. Therefore, it can't make sense without the help of a finite verb

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