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用动词替代词替代前面使用过的谓语动词或谓语部份,这一语法现象叫做动词性替代(Verbal Substitution)。动词替代词通常由“do”的一定形式担任,作这种用法的“do”叫做代动词(Pro-form do)。如:She hoped that he would search the room carefully before her arrival,but he didn’t do so(do so=seerch the room carefllfly)(她希望在她到达之