这句话错在哪里了？求助（英语）

正解：A：
i’m doing my homework.
he said that he was doing his homework.
B:
what did they say?
they said that they wanted thier dinners.

He said that he is doing his homework.间接名词从句转述部分不变。

He said that he was did his homework.
助动词和BE动词不要同时出现，这样句子就不对了。
把这句的WAS去掉吧，呵呵。

A：
I'm doing my homework.
He said that he was [doing] his homework. (要用过去进行时)
B:
What did they say?
They said that they wanted their dinner.