'it" which refers to a noun.

park sang joon of it of

That is not possible. The meaning of neither of your sentences is clear.

I'm so sorry for my terrible mistakes.

I would have written the following.

1. I thought of it as horr

I agree with Mister Micawber that the meaning of both sentences is unclear.

However, I think (and I'm just guessing here) that I can just about salvage the following from sentence #2:

I thought the surging river, with the rain coming down heavily, looked horrible.

Is that what you meant?

I also agree with Mister Micawber that the use of "of it of" in such

I thought the surging river, with the rain coming down heavily, looked horrible.
Is that what you meant?

Yes, but I think you didn't look at my last.

1. I thought of it as horrible the surging river as the rain was coming heavy.
2. The surging river as the rain was coming heavy I thought of

park sang joonYes, but I think you didn't look at my last.1. I thought of it as horrible the surging river as the rain was coming heavy.2. The surging river as the rain was coming heavy I thought of it as horrible.

No, those are still ungrammatical.
You could try,
I thought the surging river looked/was horrible as the rain was coming down heavily on

Thank you, teechr, for your continuing support.

You could try,
I thought the surging river looked/was horrib

park sang joonThe surging river as the rain was coming down heavily, I thought of it as horrible

That's incorrect (unnatural and ungrammatical).

park sang joonBut I'd like to know if an adverbial clause can modify a participle.

I suppose it can; e.g.,

The movie plot was exc