Dan's having a swimming lesson
将 's 分开——就是
Dan is having a swimming lesson
(is doing sth 正在做某事)
用what 提问
所以是 what is DAN doing?
Dan's having a swimming lesson
将 's 分开——就是
Dan is having a swimming lesson
(is doing sth 正在做某事)
用what 提问
所以是 what is DAN doing?