放在be动词情态动词助动词之后实意动词之前的副词有哪些?答:副词是一种用来修饰动词,形容词,全句的词,说明时间,地点,程度,方式等概念.频度副词可放在实义动词的前面,情态动词和助动词的后面.例:often,always,usually,early,today, lately, next,last,already,generally,frequently, seldom,ever,never,yet,例句:(1)I often help him these days.这些日子我经...
情态动词后面一定要加动词原形吗?答:是的 情态动词: can, could ,may, might, need, must, have to, will, shall, would(愿意), should(应该), ought to (应该), had better(最好).dare(敢)等.情态动词后用动词原形.一般情况下,否定形式直接加not 情态动词在句中放在谓语动词之前, 谓语动词前若有助动词,则在助动词之前,疑问...