现在完成时复习课件.ppt

The present perfect tense
现在完成时
Revision
现在
完成时
功能
短暂性动词
延续性动词
结构
标志词
动词
have gone to/have been to/have been in
现在完成时 vs一般过去时
过去分词
He is full .
He has had a big breakfast.
。
功能:
I have learned English for ten years
。
基本结构
The present perfect tense
have / has + done
助动词(可以帮助构成肯定、疑问和否定句)
过去分词
has cleaned his room.
(写一个一般疑问句)
Has he cleaned his room?
2. She has lived in London
for four years. (划线部分提问)
How long has she lived in London?
3. He has been to China, ____ ____?
(写出反义疑问句部分)
hasn’t he
4. They e back from work.
(写否定句)
They haven’e back from work.
过去分词(Past participle)的构成
:规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。
-ed。如:
。如:
,变y为i加ed。如:
,双写这个辅音字母再加-ed。如:
:详见课本附录P136-137
play-
played
study-
dance-
danced
studied
stop-
stopped
What are the key words for the Present Perfect Tense?
A: ______ your brother ______ his homework yet? (finish)
B: Yes, he ‘s already done it.
Key words
Has finished
yet
already
注意:already 用于肯定句,
yet 用于疑问句和否定句中