Relative Clauses

Relative clauses are used to give more information about a
person, thing or idea. We use that, who and which.

The man that lives next door is retired.
The woman who told me about the problem is sick.
It was the small car which caused the accident.

Reported Speech

The sequence of tenses is below:

I'm upset.	To Be + Adjective > To Be + Past Tense	He said he was upset.
I'm going home.	Present Continuous > Past Continuous	He said he was going home.
I eat lunch at work.	Present Simple > Past Simple	He said he ate lunch at work.
I went to work.	Past Simple > Past Perfect	He said he had gone to work.
I was eating.	Past Continuous > Past Perfect Continuous	He said he had been eating.
I've eaten.	Present Perfect > Past Perfect	He said he had eaten.
I'll call later.	Will > Would	He said he would call later.
I can come over.	Can > Could	He said he could come over.

Polite requests are generally used with can, could, may and would.

Can I use your telephone? Could you call back later?

May I borrow your pen? Would you mind working late today?