I wish I had learnt it.

我希望我已经学过了。

youdao

I wish I had some now.

我希望我现在有一些。

youdao

I have no wings. I wish I had, but I don't.

我没有翅膀，我希望我有，可是我没有。

youdao

"Sometimes I wish I had just one day to feel like a real ogre again."

VOA: standard.2010.05.27

And humankind receives its first set of explicit laws, no more implicit, "Murder is bad." "Oh I wish I had known!"

人类要接受明确的律法，而非隐晦的，谋杀是不好的，哦！我要是早知道就好了“

耶鲁公开课 - 旧约导论课程节选

I wish I had more time, but I must be going.
I wish I had more time, but I must be going.

I wish 课堂 - SpeakingMax英语口语达人

Mr. JOHN CHRISTIANA (Cleveland Resident): I wish I had something for you but we're from Cleveland.

NPR: Immigration Stalemate Frustrates Arizona

She was a wonderful mentor, and I only wish I had been a better student!

FORBES: Margaret The Magnificent: We Desperately Need More Leaders Like Her

And there are some that I made that I wish I had not made at all.

NPR: Political Junkie: Clinton, Lieberman and Holder