2．为了保持句子平衡.通常用先行词it作形式主语.而把真正的主语放在句末. It is easy making plans, but it is difficult carrying them. 制定计划很容易.实行它却很难. It is no use crying over spilt milk. 作无益的后悔是没有用的. It's a waste of time arguing about it. 争论这事是浪费时间. 必背:动词的-ing形式作主语的几个常用句型. It's no good talking to him. 和他谈话是没有用的. It is useless telephoning him. He is not willing to come. 给他打电话没用.他不愿意来. It's worth making an effort. 努力一下是值得的. There is no saying when it will stop raining. 无法断定这场雨什么时候会停. There is no joking about such matters. 这种事开不得玩笑. B．动词的-ing形式作表语 动词的-ing形式作表语的有两种不同的含义: 【查看更多】
