I left, but you told me to. I'd appreciate it if you'd cop to that.

我离开了，但这是你让我这么做的。如果你认错的话我会很高兴。

《柯林斯英汉双解大词典》

I'd appreciate it if you can contact me as soon as possible.

如果你能尽快联系我，我会很感激。

youdao

I'd appreciate it if you could let me know in advance whether or not you will come.

如果你能提前告诉我你是否会来，我将不胜感激。

youdao

I'd really appreciate it.

非常感谢。

I'm sorry 实战 - SpeakingMax英语口语达人

If I had won in '89 with Easy Goer, I don't know if I'd appreciate it as much as I did this past Saturday.

WSJ: Orb trainer says winning Derby worth the wait

So - but if you could help me, I'd appreciate it.

NPR: Workers Face a Cold World After Carrier

Personally, I'd also appreciate estimates on the time it will take to walk to my next gate.

CNN: Opinion: Airport Wi-Fi and mobile services are lacking