编辑:
2015-10-22
Must I clean all the room?
2 1)Can you speak English?
__________________________________________________ can表示能力(如体力和脑力方面),意为“__________”等can表示能力时,还可用be able to代替。如:
I'll not be able to come this afternoon.
2)表示请求或允许,多用在口语中,意为“__________”等。
— Can/Could I go now?
— Yes, you can.(回答语中不能用could)
3) 表示惊异、怀疑、不相信的态度。(主要用在否定句、疑问句或惊叹句中)
Can this be true? ______________________
How can you be so careless! ___________________
This cannot be done by him. __________________
4)在变否定句时,直接在后加上“not”,可缩写成_________或___________, 但不能写成cann’t。例如:
(变成否定句) He can swim. → _______________________
3 ought意思是______________后面跟带有 to 的动词不定式否定式为_________________。(C级)
You ought to read these books if you want to know how to repair the motorcar.
____________________________________________
You ought to bring the child here.
_____________________________________________
You ought not to walk alone at night. _____________________________________________
注意: ought to和should的区别:
1.ought to语气略强。 2.should较常用。
3.ought to在美国英语中用的很少,而should却相当常用。
4.ought to属正式用语。
练一练:(C级)
1The man in the office____________be Mr. Black because he went home
just now.
A. mustn’t B. may not C. can’t D. needn’t
2---Can you go surfing with us this afternoon?
----I’d like to , but I ________ look after my sister at home , because my mother is ill.
A. need B. must C. have to D. should
3----Can I take this book out of the reading room?
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