动词不定式在句中可以做主语,宾语,定语,你能举两例吗?答:It做形式主语,不定式放在谓语动词之后常用于下列结构中: a) It is+形容词(easy, important, difficult, foolish, inconvenient, unnecessary, right, wrong...)+( for/of *** .)+不定式 【例如】 It is essential to reserve a table in advance of Christmas Eve. It is hard to put my hopessinto...