When reporting a second conditional, the following tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses. changes may be applied.

Future timeA concept which is related to our perception of reality; that part of existence which is measured in seconds, minutes, hours, days, weeks, etc.

"If you came back tomorrow, I’d be able to help you." (reference to a possible future)
She said if I went back tomorrow, she’d be able to help me. (reported on the same day)
She said if I had gone back the next day, she would have been able to help me. (reported days later)

Present time

"If I had some chalk, I could write on the blackboard." (reference to the present)
He said if he had had some chalk, he could have written on the blackboard.

First conditional in indirect speech
Conditional and IF-sentences in indirect speech Third conditional in indirect speech