We （were clapping )our hands while they were singing on the stage.可不可以用clapped,我的理解是,鼓掌可以是短暂性动作,不一定唱歌的时候一直在鼓掌吧?while的主句动词不一定是be+V ed的形式吧如果帮我解决

we clapped our hands while they were marching across the park 为什么前面一定要用clapped,用were clapping 不对在哪里? 英语 用所给动词的适当形式填空. We all ---------(clap) hands when we saw Shenzhou VII launchinginto space.用clapped还是were clapping The crazy fans were clapping and 欢呼when they saw the movie star 英语单词 The fans clapped with joy when they saw the stars.这里为什么不填were clapping? We （were clapping )our hands while they were singing on the stage.可不可以用clapped,我的理解是,鼓掌可以是短暂性动作,不一定唱歌的时候一直在鼓掌吧?while的主句动词不一定是be+V ed的形式吧如果帮我解决 When I arrived at the meeting,the first speaker __and the audience__.为什么选had finished speaking,were clapping We were there ___ four o'clock 填介词 at ,on 或 in We were listening to music at home at eight o'clock.这句话有没有语法错误? Children were seen _____ their hands and ___a song when I came into our classroom.A clapped;sangB clapping;singingC clap;singD to clap;sing we were burn to We were Never Young Were we怎么造句 when we were young We were very We Were Young 歌词 where were we We were there How happy we were!