used-to的用法小结(共2页).doc
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1、精选优质文档-倾情为你奉上used to的用法小结1used to do sth.表示“过去常常做某事”,将过去和现在对比,暗示现在不做了。to为动词不定式符号,后接动词原形。如:He used to go to school at six oclock.他过去常常六点去上学。2used to do sth.的否定形式主语usednt to do sth.或主语didnt use to do sth.如:He used to play computer games all day.他过去常常整天玩电脑游戏。He usednt to play computer games all day.He
2、didnt use to play computer games all day.他过去不常整天地玩电脑游戏。【注意】usedntused not3used to do的疑问句形式及其答语(1)Used主语to do?回答:Yes,sb.used to./No,sb.usednt to.如:Tom used to watch TV.Used Tom to watch TV?Yes,he used to./No,he usednt to.(2)Did主语use to do?回答:Yes,sb.did./No,sb.didnt.如:I used to do homework after schoo
3、l.Did you use to do homework after school?Yes,I did./No,I didnt.4used to do的反意疑问句形式也有两种,类似于否定句形式。如:They used to see English movies on Sundays,usednt they?/didnt they?Yes,they used to./No,they usednt to.或Yes,they did./No,they didnt.5used to也可用于there be结构,表示“过去常有”。如:There used to be a meeting every Mo
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