Indirect: He said that the market would improve.
In conditional clauses (if), use should for all persons.
Insert should or would.
1. If I knew his address, I —— send him a telegram.
2. He promised that he —— not make the mistake again. (The direct form would read, I will not —— )
3. I promised that I —— not make the mistake again.
4. You promised that you —— not make the mistake again.
5. Do you think that I —— go?
6. I —— if I were you.
7. I —— think he —— know better than to apply for that position.