疑问句有实义动词时除了用do does did done 可不可以用情态动词
提问动词用what……do/done/doing 为什么不用did 可不可以what does
do did does done这四个都是动词吗
did do does doing done哪两个是非谓语动词.
疑问句中谓语动词什么时候用do,does did ,什么时候用is are,was ,were
强调谓语动词时do/did/does后面的动词用什么时态
句子中若没有动词是不是要加am is are does did done或是情态动词啊
助动词do did does后动词是不是用原型?
“情态动词 have done ”
情态动词+have done
情态动词肯定句 疑问句怎么用
need是情态动词时一般疑问句用什么引导
情态动词“should have done”可否用于疑问句?