Dưới đây là cách chia động từ cho các câu trong bài tập của bạn:

1. If I (know) **knew** that you were ill, I (go) **would go** to see you.
2. If she'd had enough money, she (buy) **would have bought** a car.
3. I (buy) **will buy** a car if you lend me some money.
4. I (see) **saw** him if I (go) **had gone** to the party last night.
5. We could have gone out if the weather (not be) **hadn't been** so bad.
6. If the book (not be) **isn't** expensive, I'll buy it.
7. You would be very surprised if he (return) **returned**.
8. I'll go out if it (not rain) **doesn't rain**.
9. They wouldn't come to the party if you (not invite) **didn't invite** them.
10. What (you do) **will you do** if you (be) **are** him?
11. If that hat costs much, I (buy) **won't buy** a small one.
12. If you (drive) **drive** more carefully, you (have) **will have** so many accidents.
13. If I (make) **make** that mistake again, my teacher (get) **will get** angry with me.
14. If I speak English, my job (be) **will be** a lot easier.
15. If he (go) **went** to London yesterday, he (meet) **met** his old friend.
16. I will lend them some money if they (ask) **ask** me.

Hy vọng điều này giúp bạn!