I am a bit short on cash. Can I borrow five bucks?
最近手头有点紧。能借我五美元吗？
Come on, I'll pay you back on Tuesday.
拜托啦，我周二就还你。
I promise if you lend me five dollars today, I will repay you in full next week.
我保证你今天借我五美元，我下周一定一分不少地还你。
No problem, I will spot you the cash.
没问题，我借你钱。

In order to get a loan, you have to sign over your house as collateral.
为了贷款，你不得不抵押你的房子。
If you have no collateral, it's hard to get a loan.
如果你没有东西作为抵押的话，是很难贷到款的。
Now here is 20 bucks, next week just pay me 30 back, plus ten dollars for interest.
我借你20美元，下个周你得还我30，10美元作为利息。