does是什么时态里面出现的

　　Does he know to come here first?

　　他知道要先到这儿来吗？

　　How much does it cost to become a member?

　　要成为会员得花多少钱？

　　Does the quality of teaching depend on class size?

　　教学质量取决于每个班的人数吗？

　　When does her new book come out?

　　她的新书什么时候出版？

　　I expect she does love you in her own way.

　　我想她的确是以她特有的方式爱你。