must与have to的区别many、much、some、any、a lot of、a few、a little的区别(3页).doc
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1、-must与have to的区别。many、much、some、any、a lot of、a few、a little的区别-第 3 页一、must、have (got)to的区别1、 must (情态动词)必须,一定要。表示主观的义务和必要,主要用于肯定句和疑问句中。由must引起的疑问句,肯定回答用must或have to,否定回答用neednt或dont have to,意思为不必,不需要。mustnt表示禁止,不能,不许。-You must see the doctor, Joe. You dont look very well.-You mustnt play with fire,
2、you may burn yourself.-Must I clean the window now? -No, you neednt. Must也可以表示肯定的猜测,常用于肯定句中,意思为一定是,必然。-Your sister must be a doctor in this hospital.-It must have rained last night, for the ground is wet.-Harry has been reading all day, and he must be tired.2、 have to 与 have got to 常可以互换,不得不,不得已,必须,
3、是一种客观的需要,属于被动情况。否定形式是dont have to,相当于neednt。-My mother is out, so I have (got) to look after the shop.-Jacks ill, so they have got to change their plans.-They dont have to buy a computer at present. 另外,must没有时态的变化,过去时或将来时必须用have (got) to -I must go to Shanghai today.-I have to go to Shanghai tomorro
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