1. if I haven't to get a raise, I will look for another

2. if she hasn't to appologize to me, I won't forgive her

3. unless you study harder, you won't pass the exam

4. his mother will worries very much, if he doesn't dive carefully

5. if I have got a dictionary. I can look the word up

6. I wouldn't have got wet, if I had an umbrella

7. if we had hurried, he could have missed the train

8. if we hadn't been busy, we would have gone to the concert.

I have to get a raise or I will look for another job =>If I didn't get a raise, i wouldn't find another job
She has to apologize to me or I won't forgive her.   =>If she didn't appoogize to me, i wouldn't forgive her
You won't pass the exam if you don't study harder . =>Unless you study harder, you won't pass the exam ( unless= if not ) 
He doesn't drive carefully, so his mother worries very much.=> His mother worries very much because he doesn't drive carefully 
I can't look the word up because I haven't got a dictionary. =>If I had a dictionary, i could look the word up 
I didn't have an umbrella with me and so I got wet.  => I wouldn't have got wet if i had had an umbrella with me 
We didn't hurry, so we miss the train. =>If we had hurry, we wouldn't have missed the train
We didnt go to the concert last night because we were busy.=> If we hadn't been busy, we would hav gone to the concert