我把杯子碰倒了用英语怎么说

我把杯子碰倒了
I knocked the cup over.

I dropped the cup by accident.

I knocked down the cup.和I knocked the cup down.都可以.cup 是名词,knock down中副词down可位于其前也可其后.

I knocked over the cup/glass.

I knocked down the cup.
或
I knocked over the cup.

参考：
请不要把那些罐子碰倒。
Please don’t knock down all those cans.

瓶子不可能自己倒下来，一定是有人碰了它。
The bottle couldn't have fallen down of itself. Someone must have knocked it over.