I did a mistake. (INCORRECT)
I made a mistake. (CORRECT)

I am agree with you. (INCORRECT)
I agree with you. (CORRECT)

She doesn’t listen me. (INCORRECT)
She doesn’t listen to me. (CORRECT)

He is my cousin brother. (INCORRECT)
He is my cousin. (CORRECT)

You should not to smoke. (INCORRECT)
You should not smoke. (CORRECT)