While watching television,we heard the doorbell ring.为什么不是rings

麻烦老师解答：While watching telev While watching television,______. [ ] A.the doorbell rang B.the doorbell rings C.we heard the doorbell ring D.we heard the doorbell rings While she ---- newspapers,her mother was watching TV While I was watching TV,the phone______(ring) 填什么 They learn () while they are watching and (） When/While it began to rain ,I was watching TV carry our ''five-star'' red flag while watching the games. He was watching TV while his wife was washing dishes. when we were watching it和while we were watching it哪个对,为什么? 关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM Watching watching watching I FELL ASLEEP while watching tv.这句是不是完整的应该是：I FELL ASLEEP while I WAS watching tv.后面是过去进行时吧?I FELL ASLEEP while watching tv.为什么可以这么省略的写? while he came into the room,i was watching TV.改错 A.CAME INTO B.WATCHING TV while my mother was cooking ,i ___ TV.A.was watching B.am watching C.watch D.watched 看看 选择!While watching television,__________.While watching television,__________.C.we heard the doorbell ring D.we heard the doorbell rings 翻译：While we were watching the play ,I suddenly noticed a man with a funny look . 请问这句话中的watch为什么要加ing?he fall asleep while watching television.