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該選must還是have to
作者:桑伯利  文章來源:本站原創  點擊數  更新時間:2010-04-18  文章錄入:admin  責任編輯:admin



該選must還是have to

 

請看這道題,選must還是have to

I haven’t got enough money to buy a ticketso I __________ go home on foot.

A. must                         B. have to                        C. ought to                         D. may

此題應選B。從句意上看,只能選AB。關于must have to 表示“必須”時的區別,注意以下幾點:

1. 強調重點不同:must強調主觀; have to強調客觀:

You must go now. (I want you to go now). 你必須現在就走(有“我要你現在走”之意)

If I buy that carI’ll have to borrow some money. 如果我要買那輛汽車,我得借些錢。

2. 時態形式不同:一般說來,must 只有現在時一種形式(在賓語從句中可表示過去),而have to則有多種時態形式:

He said (that) she must go with me. 他說她一定要同我一起去。

She had to go there on foot yesterday. 昨天她不得不步行去那兒。

He has had to buy a car. 他不得不買了輛小汽車(www.52ysedu.com)。

3. have to可以有分詞、動名詞、不定式等非謂語形式,而must則沒有這些形式:

He only saw her in the eveninghaving to be away all day. 他因整天得外出,所以只能晚上見她。

I regret to have to trouble you again. 我很抱歉不得不再麻煩你一次。

4. 否定式的意義不同:must 的否定式mustn’t意為“不準”、“不允許”;而 have to的否定式 don’t have to意為“不必”(=needn’t)

 

 

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