Sure! Here are the verbs in the correct form:

1. In case you **forget** the home earlier, I **will remind** you.
2. We **joined** this fair free as long as we **had** a key.
3. If it hadn't been for the severe flood, the farmers **would have had** an abundant harvest.
4. Were you **going** home late, your mother **would** treat her badly.
5. Supposing you didn’t pass the driving test, you **would decide** to take it again?
6. Unless he **spends** more time practicing, he **will lose** the game.
7. If Susan **speaks** Japanese, she **can translate** the document for you yesterday.
8. I **helped** you do fix your mobile phone on condition that you **wash** the dishes tonight.
9. But for your carelessness, we **would have signed** the contract with ABC company last month.
10. Should Linda **eat** enough vitamins, she **will not be** sick.
11. Hannie **won** the competition today if she **listens** to my advice in the first place.
12. Take a taxi, or else we **will not attend** the meeting on time.
13. But for your contribution, our project **would not be** successful now.
14. If necessary, I **will ask** you for some advice.
15. If it weren’t for their money, my company **would go** bankrupt.
16. They had to leave early; otherwise the flight **took off**.
17. In the event that you **do not receive** the email, please **call** me immediately.
18. If you **eat** too much ice cream this afternoon, you **will have** a good job like this now.
19. Without your parents' help, I **would not get** a good job like this now.

Feel free to let me know if there's anything else I can help with!