need to do sth变否定句是needn't 还是don't need to do?need sth呢?怎么变?

dinomissyou2022-10-04 11:39:541条回答

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open604 共回答了11个问题 | 采纳率90.9%
need to do sth时need 做的是使役动词,所以用don't need to do、
need sth时need做的是情态动词,所以用needn‘t
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