they don't doing their homework now.

they don't doing their homework now. They are doing their homework now.变成一般现在时和一般将来时 Don't have your children______for hours doing their homework They can't have been doing their homework He is doing his homework now.Don't b___him they are doing their homework now they must hand in them aft They can’t have been doing their homework ---doing是什么词性?have They are doing their homework now.用at this time yesterday 改写 They are doing their homework?对doing their 1.They ____ their homework in the evening.A.don't do B.don't They have been doing their homework They are doing homework now.改为祈使句