We were playing football on the playground__suddenly it began to rain heavily.A.asB.untilC.whileD.when选D理由,关于句子的成分我不太很懂,请讲解的时候说清楚

We were playing happily on the playground(同义句) We were ___ ___ on the playground We often ___that game when we were young A,play B,plays C.playing D,played We often ___that ganme we were young A,play B,plays C,playing D,played we have been students ,since we were playing改为一般疑问句 We at this time yesterdayWe at this time yesterday.A Were play B are playing Cwere playing Kangkang took some photos while we were playing together.意思是什么 求翻译,I wanted to make sure that we were on an even playing field. We were playing soccer on the playground when it started to rain heavily. Kangkang was taking some photos while we were playing together.这句对吗? Kangkang was taking some photoes while we were playing together. 这句话成立吗? We found some boys in the room.They were playing chess.(合并为一个句子） WangWei ____ many photos while we were playing toghther.这个空怎么填,为什么? they are playing foot ball 提问 We noticed that they were playing football when we went home.改为同义句 We noticed _ _ football when we went home. 同一句转换We noticed that they were playing football when we went home-We noticed()()football when we went home we found some boys.they were playing chess.合并为一句合并为一句we () some boys ()()这是运用了什么结构,还有,题干中为什么是were playing,这是什么时态?不是一般过去时直接played么 Sally _____(took / was taking)many photos while we were playing together.横线上应填什么?请解释. 英语翻译3、They were much smaller than the pellican 4、Several girls were playing volleyball on the other side of the playground ,when we had our lunch.