含有情态动词被动语态的结构为: 情态动词+be+过去分词,情态动词被动语态例句: the book can't be found. 那本书找不到。
water mustn't be wasted.水不能被浪费。
should a comma be used ?这里应该用逗号吗? the book needn't be returned now .书不必现在还。
含有情态动词被动语态的结构为: 情态动词+be+过去分词,情态动词被动语态例句: the book can't be found. 那本书找不到。
water mustn't be wasted.水不能被浪费。
should a comma be used ?这里应该用逗号吗? the book needn't be returned now .书不必现在还。