much 和 have to 的区别
3个回答

1/2 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needn’t或don’t have to,意思为‘不必,不需要’。mustn’t表示禁止,‘不能,不许’。 --You must see the doctor, Joe. You don’t look very well. --You mustn’t play with fire, you may burn yourself. --Must I clean the window now? --No, you needn’t. 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’,是一种客观的需要,属于被动情况。否定形式是don’t have to,相当于needn’t。 --My mother is out, so I have (got) to look after the shop. --Jack’s ill, so they have got to change their plans. --They don’t 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 tomorrow. 3、 have got 意思为‘拥有’,相当于have,常用于口语中。一般用于一般现在时中,在 过去时,完成时或进行时中只能用have。可以和情态动词合用。 --We must have got a car. --I had a good job last year in Shanghai. 但在助动词或动词不定式之后,只能用have,不能用have got。 --I don’t have a bike. --Do you have a bike?