need not 和do not need 为什么可以说She need notspend much money?不是need to do
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need not 和do not need 为什么可以说She need notspend much money?不是need to do
need not 和do not need 为什么可以说She need notspend much money?不是need to do
need not 和do not need 为什么可以说She need notspend much money?不是need to do
need not 和do not need 有区别,前者need是情态动词,用法和can, must, may 等一样,其后直接加动词原形,否定形式在其后加not;后者need是实意动词,用法和go ,come,read等一样,其否定形式需要在其前面加助动词don't 或doesn't.She need not spend much money?=She doesn't need to spend much money?
可以互换, 表示“没必要”
She need not spend much money。(need 是情态动词, 和动词原形一起构成谓语)
=She doesn't need to spend much money(行为动词---后接不定式作宾语, to 不可省)
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可以互换, 表示“没必要”
She need not spend much money。(need 是情态动词, 和动词原形一起构成谓语)
=She doesn't need to spend much money(行为动词---后接不定式作宾语, to 不可省)
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祝你学习进步,更上一层楼!(*^__^*)】
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有区别。need not 中的need 是情态动词,后接动词原形。而do not need 中的need 是实义动词,后接动词不定式,即 to do . E.g: Mary need not come.
Mary does not need to come.
need not里面的need是情态动词,可以直接加not,和动词原形,不能加to。don't need里面是动词,后面可以加to do. 比如,i need clean my house. 这里是情态动词,否定句就i need not clean my house. i don't need to clean my house.这里是动词。意思一样,用法不一样而已