课
程
程
资
讯
讯
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合
合
(1)I #e from Shanghai．(上海人)
I have #e from Shanghai．(从上海来)
(2)You read very well．(强调能力)
You’ve read very well．(强调一次刚完成的动作)
(3) I forget．(一时想不起来了)
I have forgotten．(仍没想起来，可能已回忆起来了)
(4) The book is written in simple English．(表状态)
The book has been written in simple English．(表动态，已用英语写成)
(5) Every time I see him，he’s been reading．(两个动作不可能同时进行)．
Every time l have seen him，he’s been reading．(强调两个动作同时进行)
(6) He is gone．(强调状态)He has gone．(强调动作和时间)
(7) He won’t #e till the play begins．(演出开始时)
He won’t #e till the play has begun．(戏已开始)
(8)AfterI leave school，I’11 go to college．(两个动作紧密相接)
After l have left school，I’ll go to college．(强调毕业后，两个动作可能有间隔)
(9) It is a long time since I saw you last．
It’s been a long time since Isaw you last 这两句话一样，后一句是美国英语)
(10) Where are you?(在哪儿) Where have you been?(去了哪儿)
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