You mustn’t go to school if you ________(be)still in bed.

问题描述:

You mustn’t go to school if you ________(be)still in bed.

are

are
条件句。如果你还没起床的话,就不用来学校了!
希望帮到你!

Are

are
条件句,一般现在时

You mustn’t go to school if you are(be)still in bed.
用一般现在时