延续性动词与非延续性动词
for/since
I have worked here for 3 years.
I have waited for you since lunchtime.
I have bought a bike.
I bought a bike two weeks ago.
I have had the bike for two weeks.
He has left.
He has been away for two year.
Pi Lin feng has borrowed money from me for one and half years.(错误)
Pi Lin feng borrowed money from me one and half years ago.
完成句子：
1、从七岁起，我就一直在学英语。I have learnt English since I was seven.
2、好久不见。I haven't seen you for a long time.
3、多久没下雨了？How long hasn't it rained?
4、咱们互相认识已有五载。We have known each other for five years.
5、我上周买了一辆自行车，但我现已把它卖掉。 I bought a bike last week, but I have sold it now.
6、这几天一直在下雨。It has rained these days.
一、延续性动词，如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。
He has lived here for 6 years.
You can keep the book for 5 days.
I stayed there for 2 weeks last year.
How long did you stay there last year?
二、非延续性动词，如：open, die, close, begin, finish, come, go, move, borrow, lend, buy等。
