present simple - past simple
"Can you help me" - He asked if I could help him
present continuous - past continuous
"What are you doing?" - She asked what I was doing
past simple - past perfect
"I made a huge mistake" - He admitted that he had made a huge mistake
present perfect - past perfect
"You've done a good job" - She said I had done a good job
Present perfect continous - past perfect continuous
"What have you been saying about me?" - He asked what I had been saying about him