Dog（狗）：常指人，好人坏人都可以；bitch（母狗），则指泼妇。
You are a lucky dog. 你真是个幸运儿。
My boss is a jolly dog. 我的老板是个风趣的家伙。
Every dog has his day. 凡人都有得意时。
David works like a dog. David工作真卖劲儿。
The film must be a real dog. 这部电影一定很糟糕。
Your partner is a dirty dog. 你的合伙人是个卑鄙小人。
The poet died like a dog. 这位诗人潦倒而死。
They treated him like a dog. 他们把他看得粪土不如。
You can't teach an old dog new tricks. 老人难改变。
He is really a dead dog. 他是个没用的东西。
Don't talk to me like that，you bitch！你这泼妇，别跟我这样说话。（慎用）
There is no point in having a dog-eat-dog attitude.
情景对话
A：We are just making a living here and I thind there is no point in having a dog-eat-dog attitude.
B：You are absolutely right.We should be more cooperative.
A：我们都是在这里谋生，我想采取相互攻击的态度是没有意义的。
B：你是对的，我们应该精诚合作。
在英语中，由动物构成的英语短语诙谐幽默、秒趣横生并且寓意深刻。有时在口语中用上几句，会令人有耳目一新的感觉。但使用时要注意东西方文化中动物的比喻和象征的差异，以免造成误解。
