1.(无不定词,无分词,第三人称单数现在式是need而非needs;用于疑问句及否定句中,后接没有to的不定式;need not缩写为needn′t)
2.必要;必须:
1.(no inf.,no participles,3rd p.sing.present tense is need,not needs;used iinterr.and neg.followed by inf.without to;need not contracted to needn′t
2.be obliged;be necessary
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