一、it句型的归纳
(一)it作形式主语的6个句型
句型1. It is + adj.(=of n.) + for sb. to do sth. / that... 某人做某事是……的。
Will it be convenient for you to start work tomorrow? 你明天开始工作方便吗?
It is vital /of great significance for students to take regular exercise. = It is vital /of great significance that students should take regular exercise. 定期进行锻炼这对学生来说太重要了。
句型2. It is a shame / pity that...很遗憾……
(1)It is a shame that some students should scribble and litter randomly on the campus.一些学生竟然在校园中乱涂乱画,乱扔垃圾,这真是太不应该了。
(2)It is a pity that I cannot go to see the movie on Saturday evening. 很遗憾,周六晚上我没办法陪您去看电影了。
说明:that引导的从句为主语从句,从句中谓语动词的语气分两种情况:①表述的内容是事实,用陈述语气,如例句(2);②若内容表明说话人的一种语气/情感则使用虚拟语气,如例句(1)。
句型3. It is no use / no good doing sth. 做某事是没有用的。
It is no use learning without thinking. 没有思考的学习并没有什么作用。
It’s no good my talking to him. 我同他谈没有用。
句型4. It is + p.p. + that... 据(说/信)/有人(建议)……
It is said that he has been admitted into a key university. 据

