what can Tom do?can后面三单还用动词原型吗?不是what can Tom does?

what can Tom do?can后面三单还用动词原型吗?不是what can Tom does? What does tom do? What can Tom's teacher do?答句是什么? what can she 后面用do还是does? can后面加动词原型吗 What can I do to help you,Tom?do 后接动词原形为什么用to help I will do [what I can] to help you,不是what I can do吗,情态动词后不应缺 can后面是不是一定要+动词原型? Can后面加动词原型么?Can to What can we do what can I do What can you do