What were you thinking,为什么要用were不用are

What were you thinking? what were you thinking. What were you thinking? What were you like? What You Were 歌词 What were you do? what were you doing? What were you dream? what were you thinking,译文 What were you thinking of What were you liake then? what degree were you receive? what were you doing 为什么是were不是what You are not what you were What were you like when you were very young? Do you remember what were you doing 还是Do you remember what you were doing 急 what you were doing与what were you doing 差别what you were doing原句Do you remember what you were doing?是初二的知识, what if you have a heart attack?at night,I always feel stiffled bysomething,I can't breathe,I thinkI suffer the sign of a heart attack.how to prevent it?