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最佳答案：need
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最佳答案：must:肯定must（必须）,否定must not/mustn't/needn't（不准,禁止）He mustn't be there 他一定不在那儿.Mus
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最佳答案：need /needn'tmust /mustn'tmay /may not
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最佳答案：may i use your penYes,you canno,you may not.or you mustn'tNeed i start from the
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最佳答案：yes,you can./no,you can't.yes,you must./no,you needn't.yes,you need(must)./no,yo
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最佳答案：No,you don't have to.
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最佳答案：1.Yes,you must.No,you need't.一般没有用need提问的2.be suppose sb.do sth.3.没有Who答案吗?是who才