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广告招租，e-mail:yesize@hotmail.com
1) need表示需要，主要用于否定句和疑问句。用于疑问句，肯定回答用must，否定回答用needn’t。have to表示他人或客观情况要求“必须”，也可以翻译为“不得不”，have to否定形式意思是“不一定”或“没有必要”。
【例如】
You needn’t come if you don’t want to.
I don’t think you need be so polite to her.
You don’t have to work so hard if you just want to pass Band 4.
Because of the heavy rain, the children have had to get up earlier than usual this week.
It was very kind of you to do the washing-up, but you ____it. (CET-4 1998,6)
A) mustn’t have d......
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