Present Simple                    ---->                           Past Simple, np. 

Tom doesn't want to help me.                             Mike said that Tome didn't want to help him.

Present Continuous ----->                                    Past Continuous

We are going to paris by train.                             Mike said that they were going to Paris by train. 

Present Perfect ----->                                             Past Perfect

Ella has passed her History exam.                     Mike said that Ella has passed her History exam.

Past Simple -----> Past Perfect

will ---->                                                                        would

Everybody will have to be quiet.                               Mike said taht everybody would have to be very quiet.