martes, 15 de noviembre de 2011

Present Perfect

We have started studying this tense in class. Present perfect is formed by:

HAVE / HAS + _______-ED or 3rd column of irregular verbs

The verb TO HAVE is in present and it is the auxiliary for this tense such as in these examples:
  • She has studied English for three years or She's studied English for three years
  • He hasn't met her parents up to now
  • Have they finished yet?
The problem with this tense is to distinguish it from the past tense. The best way is to focus on the reference of time:
  • PRESENT PERFECT: anything indiating UP TO NOW such as ever, ust, already, yet, since, for and so on.
  • PAST SIMPLE: there is an explicit reference to past such as yesterday, last ___, ___ ago, in ____ and so on. (Check the fotocopy about past simple I gave you in class)
If you need more details and you want to pratise, here you have some good links to do it so:
  1. grammar summary with exercises at the end
  2. grammar and exercises
  3. grammar : a bit long but quite complete; exercises at the end
  4. an exercise on line
  5. in Spanish, just in case you need any help
There is a previous post in this blog about present perfect versus past simple (published in February 2010); click here to see it.



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