Brush your teeth before you go to bed.you 放句首可以吗?为什么?

问题描述:

Brush your teeth before you go to bed.you 放句首可以吗?
为什么?

这是一句祈使句 改句型可以改为You have to(/must) brush your teeth before you go to bed.

brush your teeth before you go to bed
brush your teeth before you go to bed
brush your teeth before you go to bed
Y U NO BRUSH U R TEETH?

这是一句祈使句,省略主语you.还有什么问题吗?