文档介绍：Grammar and usage
1
Police in America have stepped up their search for a boy who went missing.
2. People have shown great interest in his
disappearance due to sightings of alien visits…
3. I haven’t seen Justin since .
4. Some people in Dover also say that they
have seen aliens .
have not ruled out the possibility that Justin was taken by aliens .
6. …Peterson , who has taken charge of the case .
Present perfect tense
Review:
2
The Present Perfect Tense
Form(结构):
Summary:
have/has + done
3
Find out some sentences which are in the present perfect tense in the text.
Mr Zhang has just bought a new car, but he has had touble with motorists. When he returns home at night he always find that someone has parked a car outside his gate. Because of this, he has not been able to get his own car into this garage even once. He has to walk home after he parks his car. “ what’s the matter? Have you bought a car?”“ Yes, but…” Mr Zhang has put up a “ No parking” sign outside his gate, but it has not any effect.
has just bought
has had
has parked
has not been
Have you bought
has put up
4
1. The teacher in the black jacket has left .
2. We have studied English .
3. Kung Weizheng has already finished the homework .
4. He has had his lunch .
have seen the film of Titanic twice .
students have made great progress in reading .
Feng has just returned from Britain .
Extension 1
5
Summary 1:
, just(刚刚), already(已经), before, yet(一般疑问:已经;否定句:还) never, ever等状语连用
6
Drill 1
1. I ________(have) lunch already.
2. Has the train_______ (arrive), yet?
____ never_______ (be to ) China.
4. The twin ______just _____(see) my father.
5. The twins ____(see) my father just now.
have had
arrived
has
been to
has
seen
saw
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______ (study) English for about four years.
(live) in Houji Middle School since three months ago.
old man _