lunes, 11 de octubre de 2010

The present perfect




The present perfect tense is a rather important tense in English, but it gives speakers of some languages a difficult time. That is because it uses concepts or ideas that do not exist in those languages. In fact, the structure of the present perfect tense is very simple. The problems come with the use of the tense. In addition, there are some differences in usage between British and American English.
In this lesson we look at the structure and use of the present perfect, followed by a quiz to check your understanding:


The present perfect is formed like this:
have + past participle



The present perfect is used when the time period has not finished:


I have seen three movies this week.(This week has not finished yet.)


The present perfect is often used when the time is not mentioned:


Gerry has failed his exam again.


The present perfect is often used when the time is recent:


Ikuko has just arrived in Victoria.


The present perfect is often used with for and since.


Greg has lived here for 20 years.Greg has lived here since 1978.

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