( )we were having breakfast,he came in.A.while B.when C.after 选哪个?为什么?

We were having fun in the playground when the bell We were having a party when the rain started.(改为同义句) ________ we were having a party, therain _______. 我们正吃早餐用英语说为什么不是we are having breakfeast.而是we were having breakfeast 为什么是we were having breakfast, 而不是we are eatting breakfast. We were having supper when the phone rang.We were having supper when the phone ringing.We were having supper when the phone was ringing .哪个句子是对的? We were having supper when the phone rang 改否定同上 Were not we having loved ones though only once in a we were having fun p_____ games in the playground when the bell rangRT when the guest arrived.we were having our supper.为什么不能用as soon as连接 We were having fun in the park when you called me 同义句 When Bob and his friends came,we were having our supper We were having lunch,when someone knocked the door (问号处填介词或副词) 用we,a,on,dinner,having,were,ship,when,the,weater,became,stormy造句 用所给的词语组成句子the,while,telephone,we,breakfast,were,rang,having when we were having the party,i met him.为什么要过去进行时 连词成句 The. While. Telephone. We. Breakfast. Were.Rang. Having. 译We were having a party while my neighbour is sleeping. While we were having tea请问这里的While能说成Just