IF ...NOT - UNLESS

If she doesn't come, we will go first. (Unless)

If they didn't know him, I would leave the meeting. (Unless)

If it were Sunday today, We would hang out with you. (Unless)

If you don't speak English, you won't get a good job. (Unless)

If Lan is late, she will be punished. (Unless)

If it doesn't rain hard, she will visit her parents. (Unless)

If you weren't a policeman, you would be my assistant. (Unless)

If he washes the dishes, I will clean the floor. (Unless)

If he doesn't feel tired, he will help you. (Unless)

If she doesn't do the test well, she will get bad marks. (Unless)