二级教程中有两个列句 Who read newspapers in thereading room at 7 yestday evening? Who was singing a song in the W.C. on the second floor at 12 last night?

2. 进行时态所表达的感情色彩。(详细讲解请登陆网站www.teachersun.com)进行态除了表示一个暂时的动作以外，更多的是表示一种“态”，也就是说有一种情态在里面。注意下面句子的比较：（1）It rained testerday. 昨天下雨了。（2）It was raining testerday.昨天雨哗哗地下。（1）The girl cried. 那个女孩哭了。（2）The girl was crying. 那个女孩哇哇地哭。