The given sentences have some errors. Here are the corrected versions:
The given sentences are not fully correct. Here are the corrections:
- You will lose a friend if you give a knife as a gift.
- You will get bad luck if you see a black cat in the street.
- If the cows lie down in the fields, it will rain the next day.
- You will get bad luck for seven years if you break a mirror.
- If you don't wear blue on your wedding day, you will become unhappy.
- If Janet doesn't study hard, she will not pass the exam.
- You will have a better view if you sit over there.
- If we don't find our tickets, we won't get on the plane.
- If I finish school early, I will visit the science museum.
- Susan will miss the film if she does not arrive soon.
Learn more about Conjugating verbs in conditional sentences