Unless I don't do my homework, I won't get good marks.
Unless I DO my homework, I won't get good marks.
Unless he doesn't apologize to me, I'll never speak to him again.
Unless he APOLOGIZES to me, I'll never speak to him again.
If you mix black and white, you would get grey.
If you mix black and white, you GET grey.
If I am you, I would ask for help.
If I WERE you, I would ask for help.
Unless I do my homework, I will get good marks.
Unless I do my homework, I WON'T get good marks.
If you heat ice, it melt.
If you heat ice, it MELTS.
If I visit London, I would stay at a hotel.
If I visitED London, I would stay at a hotel. OR If I visit London, I WILL stay at a hotel.
If I were you, I will help him.
If I were you, I WOULD help him.
I would go outside if it isn't raining.
I WILL go outside if it isn't raining.
If the weather will be fine, I will go for a walk.
If the weather IS fine, I will go for a walk.
If he will pass the exams, he will enter the university.
If he PASSES the exams, he will enter the university.
If I see a monster, I would say "Hello!"
If I SAW a monster, I would say "Hello!"