UNIT 7 Present perfect (1) (I have done)
A. Study this example situation:
Tom is looking for his key. He can't find it. He has lost his key. 'He has lost his key' = He lost it and he still hasn't got it.
Have/has lost is the present perfect simple:
I/we/they/you have (= I've etc.) finished/lost/done/been etc.
he/she/it has (= he's etc.) finished/lost/done/been etc.
The present perfect simple is have/has + past participle. The past participle often ends in -ed (finished/decided etc.), but many important verbs are irregular (lost/done/been/written etc.). For a list of irregular verbs, see Appendix 1.
B. When we use the present perfect there is always a connection with now. The action in the past has a result now:
* 'Where's your key?' J don't know. I've lost it.' (I haven't got it now)
* He told me his name but I've forgotten it. (I can't remember it now)
* 'Is Sally here?' 'No, she's gone out.' (she is out now)
* I can't find my bag. Have you seen it? (do y
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