2.表示过去某个时间之前发生的动作或状态, 一直延续到这一过去时刻,或还将继续下去.　 eg. When I got to know him, he had worked there for twenty years.(注意) 否定式 had not == hadn't

时态的呼应

6.--Where's Mary? --Oh,she _____the library.

A.has gone to　　 B.went to　　 C.has been to　　　 D.had gone to

　H:过去完成时棗表示过去某一时间或动作之前已完成的动作

　结构： 助动词had + 动词的过去分词

　 用法： 1.表示在过去某一时间或动作之前已经发生或完成了的动作,动作发生的时间为“过去的过去“.表示过去某一时间可用by,before 等构成的短语,也可用when,before等引导的从句或通过上下文表示.　 eg. By the end of last term,we had learned a thousand English words.

　 He had finished his homework before his father came back last night.　　　　　　　　

5.Mr and Mrs Green have_____in China for a week. A.been　 B.got　 C.arrived　 D.reached　　　　　　

4.My father____ home for nearly three weeks.

A.has gone away from　　　 B.has left　 C.has been away from　　　 D.went away　　　　　　　　

3.So far,spaceships without people _______ (reach) the moon and some other partsof the universe.　

2.--I know you _______ (choose) a picture book among these.　 --Yes,Have a look at it, please.　

3.have got,has got 虽然是现在完成时,但have got=have has got==has

　练习题:　　　 1.It's a long time since we ____ (meet) last,isn't it?

2.when 引导 的特殊问句不与现在完成时连用.

6. It is /has been +一段时间 + since 从句.自从某事发生已有一段时间了.　 eg. It is /has been two years since my brother joined the army. 注意:1.since 引导的从句中动词用过去时

5.现在完成时中的 for 与 since

for + 时间段 与延续性动词的现在完成时连用　　　 since + 时间点/从句

I have kept the library book for a week.= I have kept the library book since a week ago.