教师资格英语学科
2016-06-15 xredued04
2. 作情态动词时,need没有人称和数的变化,后接动词原形,否定式为needn’t,常用在否定句和疑问句中。如:
You needn’t worry about him. He is very mature now.
—Need I stay another day?
—Yes, you must.
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