does是什麼時態

Does he know to come here first?

他知道要先到這兒來嗎？

How much does it cost to become a member?

要成為會員得花多少錢？

Does the quality of teaching depend on class size?

教學質量取決於每個班的人數嗎？

When does her new book come out?

她的新書什麼時候出版？

I expect she does love you in her own way.

我想她的'確是以她特有的方式愛你。