Looking on the internet deeply has found these results:

I misunderstand. is the most popular phrase on the web.

I'm misunderstand. 11,880 results on the web	I misunderstand. 1357,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I'm sorry, Robin, you misunderstand. I'm going to go and do this as slowly as possible so you don't misunderstand. No, no, I'm sorry, you misunderstand. No, I'm afraid you misunderstand. Since neither me nor you made excuses, I'm not confident she didn't misunderstand. Now that I'm the iconic rock man The Thing, no one will misunderstand. I'm saying this because some of you might misunderstand. I'm saying this just in case you might misunderstand.	But you were younger then, and I thought you would misunderstand. Most people misunderstand, I find. Now, look, you mustn't misunderstand. No, I did not misunderstand you. Or do I misunderstand you, Ms. Groves? We want you to be happy, darling, don't misunderstand. It's natural for you to misunderstand. No, I'm afraid you misunderstand.

I'm misunderstand.

11,880 results on the web

I misunderstand.

1357,000 results on the web

More popular!

I'm sorry, Robin, you misunderstand.
I'm going to go and do this as slowly as possible so you don't misunderstand.
No, no, I'm sorry, you misunderstand.
No, I'm afraid you misunderstand.
Since neither me nor you made excuses, I'm not confident she didn't misunderstand.
Now that I'm the iconic rock man The Thing, no one will misunderstand.
I'm saying this because some of you might misunderstand.
I'm saying this just in case you might misunderstand.