They must be careful的一般疑问句

They must be careful的一般疑问句 We must be careful when we play sports. 变为一般疑问句 He must be at home 的一般疑问句 you must be careful They must be back by 10:00p.m.at night(改为一般疑问句） the boy should be more careful改为一般疑问句 must领导的一般疑问句 We must ___(be) careful. they must dust the room变成一般疑问句 they must speak English in English class.改成一般疑问句 they must go home now的一般疑问句,否定句和以when开头的特殊疑问句 I suppose they must be trying out new ideas in the lab的反义疑问句