问题补充：
I think MY Father and MY Mother is a good movie 改为否定句
答案：
I don think MY Father and MY Mother is a good movie
======以下答案可供参考======
供参考答案1:
I don think My Father and MY Mother is a good movie
供参考答案2:
I don think my father and my mother is a good movie.
供参考答案3:
I don think MY Father and MY Mother is a good movie,这样就行了
