I would appreciate it if you paid in cash.

假如你支付现金的话，我会不胜感激。

《牛津词典》

I would appreciate it if you could keep silent.

如果你能保持沉默的话我将非常感激。

youdao

I would appreciate it if you call me back this evening.

如果你晚上给我回电话，我会非常感激。

youdao

But I would really appreciate it if you flew lower, Superman.

但是如果你能飞得低一点，那就太好了，超人。

I'm afraid of 实战 - SpeakingMax英语口语达人

If Netflix can keep such terrible things from happening to me, I would appreciate it.

FORBES: Could Netflix Prize 2 turn into a horror film?

If you would check to see if you have his email disclosed and remove it, I would appreciate it.

FORBES: A Film Producer, A Cancer Doctor, And Their Critics

If anybody has a pointer, I would appreciate it.

FORBES: Could Apple's Patent Victory Over Samsung Spur Long-Term Innovation?