英语现在时,过去式,过去分词造句

I'm doing homework
I was doing homework
I had done homework
再问： 再给九个，谢谢了，加分
再答： She is reading a book. She was reading a book. She had read a book. He is going home. He was going home. He had gone home. THey are having meal. They were having meal. They had had meal.