狗是人类的亲密朋友，在人们的生活、工作中扮演着不可或缺的重要角色。在美国，人们喜欢狗，美国人因此也喜欢使用很多和狗相关的短语表达。
1、to lead a dog's life 形容人过着贫困潦倒、惨不忍睹的生活
Tom’s been leading a dog's life since he got divorced.
汤姆自离婚后一直过着混沌潦倒的日子。

2、dog eat dog 残酷、竞争激烈
Some people say we live in a dog-eat-dog world.
有人说，我们生活在一个竞争激烈的世界。

3、work like a dog 指一个人努力、卖命地工作
They say that to be successful, a person has to work like a dog.
他们说，一个人想要成功就得拼命工作。

4、dog-tired 筋疲力尽
Such hard work can make him dog-tired.
如此坚辛的工作使他疲惫不堪。

5、sick as a dog 病得严重
The situation would be even worse if she became sick as a dog.
如果她病得厉害，情况会更糟。

6、Every dog has its days.每个人都有属于自己的运气/每个人都有时来运转的一天
Don't give up and try your best I believe every dog has its day.
不要放弃，继续努力，我相信每个人都会有成功的时候。