break away意为“逃脱”“与……断绝关系”，常与from连用。break off意为“突然停止”，指某一正在进行的动作突然中止。

1. They tried to break away, but failed.他们想逃脱，但没有成功。

2. Finally we broke away from the enemies.最后我们摆脱了敌人。

3. Tom broke off his studies and hurried home. Tom突然辍学，匆忙赶回家中。

break up意为“（会议等）结束、散会”，与into连用表示“分解”“分成”。break down指机器等坏了。breakdown也可表示“明细”，比如price breakdown价格明细表。

1. The garden party broke up at 6 p.m.游园会在下午六点结束。

2. Then we broke up into groups.然后我们分成了几个组。

3. Then the car I was in broke down.当时我乘坐的汽车坏了。

两者都有“强行进入”“打进”等意。区别是break in是不及物动词词组而break into则是及物动词词组。

1. Thieves broke in during the night.夜里小偷闯了进来。

2. A house was broken into during the night.夜里有人强行闯进了一家房子。

break forth意为“迸发”“突然出现”，常与in/into连用。break out意为“爆发”“突然发生”，常指一些重大事件爆发或不幸的事情发生。

1. The trees broke forth in green.树一下子全绿了。

2. A fire broke out during the night.夜里突然起火了。