2016-2017学年 人教版 必修三 Unit 4 Astronomy :the science of the stars grammar课件 (10张)
2016-2017学年 人教版 必修三  Unit 4 Astronomy :the science of the stars grammar课件 (10张)第4页

1)It + be +表语(n. / adj)+ 主语从句

It is still uncertain whether he is coming or not. It is my honor that I have the chance to meet the great writer.

2) It + 不及物动词+ 主语从句

It happens that they were absent. It doesn’t matter whether he will come or not.

3)It + be +done +主语从句

It has been decided that the park will not be open on Mondays.