instalment这个单词前面接的是on还是in

instalment这个单词前面接的是on还是in

You can buy a car on instalment purchase.
你可以分期付款购买小轿车。
He paid $50 down and the rest in monthly instalment.
他先付50美元，其余每月支付。
He put 25 down and pay the rest in instalment.
他付了25英镑的定金，其余的分期付款。
We are paying for our holidays in instalment of $50 monthly.
所以还是要用in因为第一个on是on purchase,所以，要看具体的修饰对象和中心词~
懂了吗？？

in

in instalment 分期付款

都有。
He pays off his creditor in twelve instalment.
他分12次付还了债主的钱。
You can buy a car on instalment purchase.
你可以分期付款购买小轿车。

instalment: [ in'st??:lm??nt ]

n. 就职,装设,分期付款

例句与用法:
1. We will pay for houses by monthly instalments.
我们将按月分期付款买房。

2. When will you pay the last instalment of the loan?
你什么时候付清最后一期分期贷款？

3. He will pay back the money in monthly instalment.
他将按月分期付款的方式偿还。

4. He put25 down and pay the rest in instalment.
他付了25英镑的定金，其余的分期付款。

英英解释:
名词instalment:

1. a part of a broadcast serial
同义词：episode, installment

2. a part of a published serial
同义词：installment

3. the act of installing something (as equipment)
同义词：installation, installing, installment

其实ON和IN都可以，但是我查了下，大多数是用IN

分期付款是buy...in instalment