1. break away(from) 突然离开，放弃；（与……）脱离
eg: The wing of the plane broke away in mid-air and the plane crashed. 机翼在空中脱落，飞机坠落了。
Can’t you break away from old habits? 你不能戒除旧习惯吗？
2. break down vi.损坏；（汽车）抛锚；失败 vt.分解（强调物理变化）
eg: Negotiations have broken down. 谈判已经破裂了。
The car/ engine broke down. 汽车/引擎坏掉了。
Sugar and starch are broken down in the stomach.糖和淀粉在胃里被分解。
A better method is to take the waste far out to the sea in ships where the wind and waves break it down. 一个较好的办法是用船把废物运到远海，利用那里的海风和海浪分解这些物质。
3. break in/into 闯入,打断,开始工作
eg: His house was broken into in the midnight.半夜有人闯入他家。
4. break off 中断,折断,突然停止,脱落,暂停,断绝,解除
eg: He broke off in the middle of a sentence. 他一句话还没说完就中断了。
break off an engagement / conversation 突然解约/ 终止谈话
5. break out （fire, disease, war, violence）突发,爆发,
相当于不及物动词，不带宾语，也没有被动语态。
Eg: A fire broke out during the night. 晚上发生一场火灾。
6. break up 打碎,破碎,分裂,结束,衰落,分解(强调化学变化),变坏,驱散
eg: The gathering broke up in disorder. 聚会一哄而散。
The marriage is breaking up. 婚姻濒临破裂。
The police broke up the crowd. 警察驱散人群。
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