用法:
1.表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语,如:already, yet, ever, never, just, before, once,twice等连用,也可以和包括现在在内的时间状语,如these days,today,this year,so far等连用.eg.I have already posted the letter. (信已经不在我这儿了)                  

6.Mr and Mrs Green____(travel)to the south of China next week,aren't they? 7.I___(not see)the film with you because I've seen it already.  8.He told us that he_____(stay)here till the next week.    9.I_____(lose)my pen this morning. I haven't found it yet.

动词的时态（下）

G:现在完成时?表示到目前为止已经完成，并对现在留下某种后果和影响的动作。

结构：助动词have/has + 动词的过去分词

4.The sky is black. It ____ (rain), I'm afraid.     5.If it ___(not snow)tomorrow,we'll go skating 

2.He'll write to you as soon as he _____ (arrive ) in Hainan.  3.The students of Class One ___(have)a meeting from three to five yesterday afternnon.

1.The Chinese people ____(work) hard to make their country stronger and more beautiful.

5.Lucy said it ___________ (rain) later on.

思考题:

4.The bell for the class rang while they ___________ (play) on the playground.

3.Dick will pass the message on to your sister as soon as he ______ (meet) her in her office tomorrow. 

1.Mary and Joe go to the Shopping Center ___ .  a.once a week   b. in a week   c. next week   d. for a week            2.Be quiet! The baby ________ (sleep) in the next room.

3.表示按计划或安排即将进行的动作,表示这种动作的动词有:come, go, leave, arrive, start, see等,并常与表示将来时间的状语连用.  eg. They are leaving for Australia tomorrow afternoon.                    

注意: 某些表示感觉或状态的动词,如 love, like, prefer, hate, see, know等一般不用现在进行时. eg. Lucy prefers art to science.

练习题：