must和need有什么区别?

如题所述

一、用must来提问可以这样回答:

回答如果是肯定,那么可以用must回答。如:Yes , you must.

若是否定,那么用need not,或者don`t have to。如:No, you don`t have to. 

例句:―Must I wear the suit?―No, you needn't(No, you don't have to) .You can wear anything you want .

二、用need来提问分两种情况:

1、如果need在问句中是作为情态动词,回答如果是肯定那么用must, 回答否定就用need not,或者don`t have to。

2、need在问句中作为实意动词,可以用be,do/does,hava/has等助动词进行回答。

例句:1、-Need we do the laundry?

―Yes, you must.

2、-Do you need a job?

-Yes ,I do.

扩展资料

常用的情态动词有:can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would);

其中:

1、只做情态动词:may, might, must…

2、可做情态动词又可做实义动词:如:need, dare…

3、具有情态动词特征:have(had,has) to,used to, ought to

4、可做情态动词又可作助动词:如:shall(should),will(would)

参考资料来源:百度百科-情态动词

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