cash 常用作名词，意为“现金，（任何形式的）金钱，资金“，是不可数名词项目加盟，例如：
Do you have any cash on you?
你身上有现金吗？
Will you pay by credit card or in cash?
你用信用卡还是现金付款？
He says he wants cash in advance before he'll do the job.
他说在做这项工作之前要预付他现金。
cash 还可以用作动词，它对应的短语动词 cash in 表示：
1、to earn out of something in big amounts
赚大钱
2、to get returns on an investment
获得投资回报
3、to make a huge profit
赚大钱
4、to get cash in exchange for
换来现金
5、could be used negatively highlighting ill means of making money
可能会被负面地用来强调不正当的赚钱手段
例如：
1、This is a good year for investing in real estate and gold, and you can cash in on it.
今年是投资房地产和黄金的好年头，你可以从中获利。
2、People who invest in diamonds always cash in the benefits later.
投资钻石的人总是在以后获取收益。
解析：关系代词 who 引导的定语从句项链英文项链英文，修饰先行词 people.
3、I fail to understand why cashing in is the only goal that today’s generation makes for themselves.
我不明白为什么赚大钱是今天这一代人为自己制定的唯一目标。
解析：动名词 cashing in 在句中作主语，谓语动词用单数。
4、It is hard to digest that my brother’s wife cashed in the necklace that belonged to my mother. She was not even entitled to it!
我哥哥的妻子把我母亲的项链兑现了，真是难以理解。她甚至没有资格得到它！
解析：
1、关系代词 that 引导的定语从句，修饰先行词 necklace.
2、entitle sb to sth 意为”使享有权利；使符合资格“，常用于被动语态。
