1.It was five years before the bridge was built.
It will be five years before the shopping mall is completed.
2.It wasn't long before the job was finished.
It won't be long before I come back home.'
3.It is the sense of language that helps you a lot in terms of learning a foreign language.
4.Was it when you got married that you started to grow more mature?
5.Not until midnight did I complete the experiment.
6.It is the third time that I have been to the US.
7.It was not until 11pm yesterday night that I came back home.