why did you said that you() busy括号里面填什么?

why did you do that? 请求why would you do that?和why did you do that?有什么区别 why did you say that you were busy?为什么用were而不用would be或者had Did you ( )the tigers ( )the zoo?括号里填什么? what did you mother { }yesterday?括号里应该填什么? Do you know ()?Because...括号里面填什么? Did you hear 什么 I said? That is good news ( )you.括号内填什么介词 Can you make the plane ( )that?括号填什么? Why did you know? why did you go why were you do that 和why are you did that ,这两句话有错吗?