do的过去式: did;does是do的第三人称单数,没有过去式。
do:v.做,干,办(某事);(以某种方式)做;行动
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。