Sure! Here are the correct forms of the verbs for the gaps:

1. If you **expose** phosphorus to air, it **burns**.
2. If you **heat** ice, it **turns** to water.
3. If you **don't hurry** up, you **will be** late for school.
4. If you **stood** in the rain yesterday, you **would be** sick now.
5. If I **find** your glasses, I **will tell** you.
6. What **would** you **do** if you **saw** him?
7. If the books **were** cheaper, I **would buy** them all.
8. If you **studied** last night, you **would be** ready for the test.
9. If I **knew** about the traffic, I **would leave** earlier.
10. If she **attended** the course, she **would improve** her skills.
11. If he **took** his medicine, he **would feel** better.
12. If they **invested** wisely, they **would have** more money now.
13. If you **were** more careful, you **would not make** that mistake.
14. If I **had realized** what was happening, I **would have acted** differently.
15. If we **had met** last year, we **would be** friends now.
16. If he **practiced** more, he **would perform** better.
17. If you **asked** me, I **would tell** you the truth.

### II. Rewrite the sentences below using conditional sentences

1. If I move to Spain, I will have to get used to Western culture.
2. If my brother had not gone home late yesterday, he would not be tired now.
3. If she had not done the homework carefully, she would not have gotten a high score today.
4. If it had not rained yesterday, I would not have gotten sick today.
5. If she had not missed the film’s end, she would know who the murderer was.
6. If we had asked for directions, we could have reached Jade’s house now.