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1) I have learned English for 5 years.
2) He has lived in Beijing since he was born.
3) John has been married since two years ago.
从过去某时开始的动作或状态一直持续到现在(可能还要继续下去),常和for , since 引导的时间状语连用.
_____ five years 2._____ five years ago
3._____ he was born 4. ___ over a week
5._____ last Friday 6._____ 1998
7.____ half an hour
8. _____half an hour ago
9. I’ve known him ______ we were children.
for
since
since
for
since
since
for
since
since
3: 现在完成时还可：
1) I’ve never been to Beijing.
2) He has read this book before.
3) I have already read this book many times, It’s a waste of time for me to read it again.
谈论一个动作到现在发生了多少次。
现在完成时标志词：
already, yet, ever, never, before , just, recently, since, for ,so far, by now , till now , in / over / during the past / last few years 等。
He has already finished his homework.
=He has finished his homework already.
否定句：
疑问句：