2009年高三英语精编复习资料：语法专题（It 句型）
1.It is ＋adj.（＋for sb.／sth.） ＋ to do sth.
用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。如：
It is necessary to change your job.
It was very hard for them to walk such a long way in the snow.
2.It is ＋n.（＋for sb.／sth.） ＋ to do sth.
用于此句型的名词有： pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。如： It is a pity for you to have missed such a wonderful play.
It is bad manners for the young to take up the seats for the old.
