seem 的用法

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seem to be doing sth ,seem to do ,seem to have done sth

2009-08-04 17:05 菱零 | 分类:英语考试 | 浏览16115

seem to be doing sth ,seem to do ,seem to have done sth 这三者有什么区别,是什么意思啊

seem to be doing sth表示不定式的动作和主句中seem是同一个时态,比如,He seems to be doing his homework. 他好像正在做作业;



seem to do 表示不定式的动作发生在主句动词seem之后,比如It seems to rain. 好像要下雨了 rain的动作,是发生在seem之后的;



seem to have done sth表示不定式的动作发生在主句动词seem之前,比如 she seems to have finished her homework. 她好像做完了她的家庭作业。finish动作发生在seem之前




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