Dưới đây là lời giải cho các câu bài tập trong hình bạn đã gửi:

1. You are so nervous because you drink too much coffee.
   - If: If you didn't drink too much coffee, you wouldn't be so nervous.

2. I'll call the teacher if you don't leave alone.
   - Unless: Unless you leave alone, I'll call the teacher.

3. As I don't have enough money, I can't buy a new car.
   - If: If I had enough money, I could buy a new car.

4. When you ask me for the car, I will lend it to you.
   - Unless: Unless you ask me for the car, I won't lend it to you.

5. He isn't a good runner because he doesn't train every day.
   - If: If he trained every day, he would be a good runner.

6. I can't tell you what time it is because I don't have a watch.
   - If: If I had a watch, I could tell you what time it is.

7. The dress is very expensive, so she can't buy it.
   - If: If the dress weren't so expensive, she could buy it.

8. Tom doesn't do anything if you don't tell him what to do.
   - Unless: Unless you tell him what to do, Tom doesn't do anything.

9. If she doesn't hurry, she'll miss the bus.
   - Unless: Unless she hurries, she'll miss the bus.
 

1. If you drink too much coffee, you are so nervous.
2. Unless you leave alone, I'll call the teacher.
3. If I had enough money, I could buy a new car.
4. Unless you ask me for the car, I won't lend it to you.
5. If he trained every day, he would be a good runner.
6. If I had a watch, I could tell you what time it is.
7. If the dress wasn't very expensive, she could buy it.
8. Unless you tell Tom what to do, he won't do anything.