Question

He said that that's all he can do

I think it should be ----0000---- He said that, 'that's all he can do."

Answer 1

He said, "that's all I can do.".

Answer 2

Notice that if you swtich from first person to first person with quote the pronoun would have to change because he did not actually say "That's all he can do" to you. He said "That's all I can do" to you, after which you interpretated it as he said that that's all he can do.

Answer 3

okay, is that sentence an indirect quotation?

Answer 4

The original sentence is indirect quotation. But the one I gave you is direct quotation.

Answer 5

Use of ""=direct quotation
Use of that--=indirect quotation since you are writing without using direct quotation from him in your own words.

Answer 6

Do you get it?

Answer 7

yes, I get it, thanks a lot!