what were/was they/he/she/you doing?
追问那这句呢
Billy is opening his present
___________1
____________________2
方法
方法就是用awhat提问,然后加上be动词,再加主语,再加动词ing形式
What is Billy doing?
追问谢谢
追答没事,
本回答被提问者采纳只能在这之间使用
追问那这句呢
Billy is opening his present
___________1
____________________2
方法