我们到家时已是半夜。。
___________________________________________________________________________. ⑤.it will be / was ... before ...
我们下次再见要两年以后了。
___________________________________________________________________________.
(2) 语境呈现：观察下列句子并分析其特点
1.Tony felt it his duty to mention the fact to Nancy.
2.The teacher made it interesting telling a short story about the monkey.
3.I think it best that you should stay here.
4.They haven’t made it known where they are to hold the conference..
总结归纳：
1. It is important to know your limitations.
2. It is no use saying any more about it.
3. It is pleasant sitting on this sofa.
4. It was clear that Vivian had returned.
总结归纳：it可作 ，没有 ，只是把it移到句子的 ，以避免句