YOU SAID:

I would that she had done her homework

INTO JAPANESE

彼女は彼女の宿題を行っていたと思います

BACK INTO ENGLISH

I think she had done her homework

INTO JAPANESE

彼女は彼女の宿題をするいたと思う

BACK INTO ENGLISH

I think she was doing her homework

INTO JAPANESE

彼女は彼女の宿題をやっていたと思う

BACK INTO ENGLISH

I think she was doing her homework