1. I'm going to divorce my wife.
我要和我妻子离婚了。
还能这样说：
My wife and I will get divorced.
My wife and I have decided to break our marriage.
应用解析：
be divroced from/divorce oneself from 与……离婚；脱离；与……分开
2. Marriage is compared to a cage fro me.
对于我来说婚姻就是牢笼。
还能这样说：
I am always controlled since marriage.
For me, once married, I am caught in a trap.
应用解析：
compared with 和……比较起来；
beyond compare 无与伦比的，不可及的；
not to be compared with 相差极远，远不如；
compare to 比拟，比作
3. After two years of marriage, they are divorcing.
他们结婚刚两年，现在正在闹离婚。
还能这样说：
They are calling it quits after two years of marriage.
They are getting divorced after two-year marriage.
谚语：
There are no birds of this year in last year's nest.
年年岁岁花相似，岁岁年年人不同。
4. She got a divorce from him last week.
她上周和他离了婚。
还能这样说：
Their marriage ended in divorce last week.
They ended their marriage last week.
谚语：
Something you get as the product of making something else.
有心栽花花不开，无心插柳柳成荫。
5. My wife's a two-timer.
我妻子对我不忠。
还能这样说：
My wife is unfaithful to me.
My wife is disloyal to me.
谚语：
Time and tide wait for no man.
岁月不待人。
6. We just can't get along.
我们感情不和。
还能这样说：
We are on the outs these days.
My wife and I do not agree with each other.
应用解析：
affair of love 私通；
affair of the heart 恋爱事件；
current affairs 时事，新闻；
domestic affairs 内政，家事
7. I'm separated from my wife.
我和我妻子分居了。
还能这样说：
We are living separately right now.
I am estranged from my wife now.
谚语：
Never judge from appearances.
不可以貌取人。
8. It's not my fault in the breakdwon of the marriage.
婚姻破裂不是我的错。
还能这样说：
I am not the person who is to be blamed for the falling apart of the marriage.
It is not me who caused the break-up of the marriage.
谚语：
A fault confessed is half redressed.
肯认错就改正了一半。