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.　　　　　　　

4.现在完成时和一般过去时的区别

现在完成时所表明的是过去发生的动作对现在的影响,强调的是现在的情况,不可以和表示过去的时间状语yesterday,in 1991,three days ago last time,last night等连用一般过去时表明的是过去发生的事实,和现在不发生关系.　　　　　　

3.现在完成时中been to,gone to和been in/at been to去过某地,表示某人的一种经历,可以和once,twice,already,ever,never等连用.　　 eg. She has been to Shanghai twice. (表示目前人在这里)　　　　　　　

gone to 去某地了,说话时某人已离开此地,在去某地的途中或已在某地,

eg. She has gone to Shanghai。 (表示现在她人不在这里)　　　　　　　

been in/at 逗留在某地(已经一段时间).常和for ten days,since I came here等连用.

eg. She has been in Shanghai since she moved there.