We were cleaning the room when someone knocked at the door.这句话的意思是什么?

We were cleaning the room when someone knocked at the door.这句话的意思是什么? We were very tired after cleaning the house,but we were happy for it was very clean and comfortable What-------you-------(do) while the others were cleaning the classroom SAT语法句子提升题,When we were cleaning the garage,my sister and I found [the old soccer ball in the dark corner we used to play with when we were young.]A.(as it is now)B.in a dark corner from when we were young the old soccer ball we played cleaning the we see the street cleaner__the street every day .(clean/cleaning) 改错：We must keep the classroom cleaning erery day. we must keep the classroom cleaning every day,改错 we are cleaning the house的一般疑问句 We should make the school ( )A.cleaning B.clean We are cleaning the room now改为否定句 we are cleaning the library (改为否定句) The Way We Were 歌词 They were cleaning the room at the time.改为被动语态 5.英语转换句子的题目1.the students were busy with the cleaning when the teacher came inthe students were ___ ___ their classroom when the teacher came in.2.Last Sunday,we heard them sing Pking Opera in the theatre.They were heard ___ ___ Pek We often help the old man（） ? A.to do some cleaning B.cleaned C.cleans D.cleaning To keep the room tidy,we should ___ every day.A.cleaning B.cleans C.do some cleaning D.makes some cleaning They were cleaning the room at this time yesterday.(改为同义句)