一、IT句型

1.It +be + 一段时间 +before 从句

2.It + be+ 一段时间 + since从句

3.It + be+ 时间 + when从句

4.It + be+ 强调部分 + that从句

注意:It was at this shop that you bought the watch, wasn’t it ?

Eg:1.It was already 8 o’clock        we got home.

   2.It will be three hours         he arrives at the airport.

   3.It is ten years         I last saw you.

   4.It has been three years        he joined the army.

   5.It will be midnight          they get home.

   6.It was at 5 o’clock           he started in the morning.

   7.It wasn’t long           he started to learn English.