英语系动词,情态动词,助动词分别有哪些有哪些答:系动词:be seem appear sound feel look smell taste get become come go prove turn 情态动词:can, could, may, might ,will, would ,shall ,should ,must ,need ,dare ,ought to ,used to 还有情态短语:had better,would rather/sooner,be to 助词:be(am,is,are),have,do 及它们...
英语句子中什么时候用系动词Be,什么时候用助动词Do?答:V, X 复宾及物动词 ask sb. to do sth. find it beautiful 有些动词兼类的。3. 情态动词:can, must, ...4. 助动词:do , be, have, shall, will 关于否定句和疑问句中用助动词do, does, did的问题,可以这样去判断:如果句子谓语(肯定句)中没有3、4类动词(包括be系动词)时,...