1.Every time l heard the other studentstalking and laughing, I felt even morelonely.
每次听到其他同学有说有笑，我觉得自己更加孤单了。

(1)every time在本句中引导一个状语从句，意思是“每次.…….”。every time也可以换成each time。
如:Every/Each time
l ask you to do something,you always say you are too busy.每次我让你做点儿什么，你总是说太忙。

(2)hear sb.doing sth.听见某人在做某事，强调动作正在进行。
hear sb.do sth.听见某人做了某事，强调动作的全过程。
l heard her singing  in the next room when lpassed by.我路过的时候听见她在隔壁房间唱歌。
l often hear her sing that song.我经常听到她唱那首歌。