pay back 和 pay off区别

这篇文章值得仔细研究.（deserve）
This article deserves to be closely studied.
你打算什么时候还他钱?（pay back）
When do you plan to pay back his money?
汤姆是银行经理,他有一份很高的薪水
Tom is the manager of the bank with a high salary.
当她洗衣服的时候,电话响了.（while）
The phone rang while she was doing her laundry.
我的爸爸喜欢爵士音乐胜过摇滚（prefer...to）
My father prefers Jazz to Rock'n'Roll.

pay back sb for sth
或者 pay sth back to s

偿还，付清工资，解雇，支付付定金

pay back 是偿还；
而pay off 强调还清.
He paid the money back. 他还钱（不一定还清了）
He paid the money off. 他还清了钱.

The article deserves careful study.When are you going to pay back his money.Tom is a bank manager,he has a high salary.While she washing clothes,the phone rang.My dad perfer jazz music to rock.

1.He put a large sum of money in the bank.
2.it costs all his saving to buy this car.
3.Money must be paid back within a month.(被动要用paid )
4.Two robbers rushed to her when she was walking with her purse.
5.this bag contains a lot of things you need.

pay back
v.
偿还(借款),报答,报复
一般单独使用

选pay off：得到好结果,取得成功的意思

Pay--用于名词指工资,收入.用于动词指“支付”后面接支付的对象（人）
Pay for--偿还,后面接支付的物,不接人.
Pay back--也有偿还的意思,但与pay for 相比有“投资回报”的意思,所以也衍生出“报答”“报复”的意思.
Pay off--还清
Pay back for-- Pay back + for,后面接得到回报的原因.

答：pay back,pay off,pay 的主要用法如下：
1.pay
1）vt.支付,付；偿还,补偿
I must pay her.我应该付她钱.
If you do not pay the rent,the landlord will kick you out.
如果你不付房租,房东就会把你撵出去.
The sale of the house should fetch in enough to pay our debts.
出售这栋房子足以付清欠我们的债.
2）vi.付款；偿还
I'll settle with you,you have to pay for your insulting.
我早晚要找你算这笔账的,你得为你的侮辱行为付出代价.
3）n.工资,薪水；付款
Part of their pay is taken out in houses.他们的部分工资是以住房偿付的.
2.pay off,付清,还清(债务)
Pay off your credit cards.还清你的信用卡欠款.
Though it still takes time to pay off your debts,you begin to see results almost immediately.
虽然这依旧要花很多时间去偿还你的债务,但你很快就会看到结果.
3.pay back偿还,报复
Some day I'll pay you back for this!
总有一天我会为此报复你的!
欢迎提问,

pay back 表示偿还.
pay off更体现一次付清