导图社区 must与have to辨析
must与have to在英语中均表示“必须”的概念,但在具体使用上有一些微妙的差别。快来看看吧!
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must与have to辨析
1.must
"必须" V情+v原 没有人称和数的变化
出自本人自觉(主观)
He must do his homework. 否:He mustn't do his homework. 一般:Must he do his homework? 肯回:Yes,he must./否回:No,he needn't (doesn't have to)
以must开头的一般疑问句,否定回答时,不用mustn't (禁止,不准),而用needn't (don't/doesn't have to)(不需要)
must本身为情态动词,不与其它情态动词连用
一般疑问句句式:V情+主语十V原+其他?
2.have to
"必须;不得不" 有人称和数的变化
指外界环境的要求(客观)
He has to do his homework. 否:He doesn't have to do his homework. 一般:Does he have to do his homework? 肯回:Yes,he does./否回:No,he doesn't.
have to变各种句式需借助动词(do,does,did)
have to可以与其它情态动词连用. 例如:Will he have to tomorrow?
一般疑问句句式:V助+主语+have/has to+其他?