315.Take a good rest ,you _____worry about your study.A.needn't B.don't need C.not need D.needn't to

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315.Take a good rest ,you _____worry about your study.A.needn't B.don't need C.not need D.needn't to
315.Take a good rest ,you _____worry about your study.
A.needn't B.don't need C.not need D.needn't to

315.Take a good rest ,you _____worry about your study.A.needn't B.don't need C.not need D.needn't to
选择A
need 是特殊的情态动词,表示不需要做某事时,有两种用法:
1.don't need to do sth
2.needn't do sth.
B选项少了一个to.D多了一个to,C少了助动词do,只有A对.

a
needn't or don't need to

A ,先分析题目,意思是你要休息一下,不要担心你的学习,然后分析一下选项,need 有2钟用法,一种是用作动词 need to do sth ,一种是用作情态动词,只有need ,没有人称和数的变化,就如同must 等等情态动词一样。在选项中 B 少了一个to ,因为前面有don't,显然是用作动词,need to 的用法,所以B不对。c项,没有这种用法,D项后面有个to 是need to 的用法...

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A ,先分析题目,意思是你要休息一下,不要担心你的学习,然后分析一下选项,need 有2钟用法,一种是用作动词 need to do sth ,一种是用作情态动词,只有need ,没有人称和数的变化,就如同must 等等情态动词一样。在选项中 B 少了一个to ,因为前面有don't,显然是用作动词,need to 的用法,所以B不对。c项,没有这种用法,D项后面有个to 是need to 的用法,但是否定是don't need to ,所以也不对,只能选A。

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选A
need可以当情态动词用,在后面可以直接加not,也就是needn't
need当动词时要用need to,否定要用don't need to