were doing和are doingI can guess you were in hurry.You___you sweater inside outA.had worn B.woreC.were wearing D.are wearing为什么？

------you ------your homework now?do/ doing,are/doing ,were/ doing,does /do 选b为什么? what are you doing和what you are doing区别 助动词和实义动词能做谓语 am is are was were +doing这里的am is are was were 是助动词吗 doing是实义动词吗 doing不是非谓语动词吗 what were you doing? 英语,were doing? what you when your mother came back?A.are;doing B.were;doing C.did;do D.was;doing What___they___at eight yesterday evening?A.are,doing B.did,do C.have,done D.were,doing what were you doing this morning还是what are you doing this morning were doing和are doingI can guess you were in hurry.You___you sweater inside outA.had worn B.woreC.were wearing D.are wearing为什么？ what were you doing和whar you were doing的区别书上有what were you dong也有what you were doing,请问区别是什么 What___you___when someone knocked at the door?A.did;do B.were;doing C.do;do D.are;doing什么时候用was/were doing,什么时候用did what_when you mother called you up?a.are you doing b.did you do c.you were doing d.were you doing what are you doing? What are they doing? what are they doing? What are you doing? what are you doing What are you doing?