Ex2
1.He can't go out because he has to study for his exam.
=> If he didn't have to study for his exam, he would go out
2. We turn on the heater all the time. We have to pay three million dong for electricity a month
=> If we turned on the heater all the time, we would have to pay three million dong for electricity a month
3. She has a headache after work every day. She works in a noisy office.
=> If she didn't work in a noisy office, she wouldn't have a headache after work
4. She is lazy so she can't pass the exam
=> If she weren't lazy, she would pass the exam
5. There is so much light in the city at night. We cannot see the start clearly
=> If there weren't so much light in the city at night, we would see the start clearly
6. She is very shy, so she doesn't enjoy the party
=> If she weren't very shy, she would enjoy the party
7. People thow rubbish in the stret. The street doesn't look attractive
=> If people didn't throw rubbish in the street, the street would look attractive
8. There are so many billboards in our city. People cannot enjnoy the view
=> If there weren't so many billboards in our city, people would enjoy the view
9. I don't live in a big city, so I can't go to the cinema very often
=> If I lived in a big city, I would go to the cinema very often
10. Lan doesn't have a bike, she walk to school
=> If Lan had a bike, she wouldn't walk to school

Ex 2: Rewrite a conditional sentences type 2:
1. He can't go out because he would has to study for his exam.
=> If he couldn't go out , he would study for his exam.
2. We turn on the heater all the time. We have to pay three million dong for electricity a month
--> If we turned on the heater all the time. We would have to pay three million dong for electricity a month
3. She has a headache after work every day. She works in a noisy office.
-> If she worked in a noisy office , she would has a headache after work every day
4. She is lazy so she can't pass the exam
=> If she was lazy , she couln't pass the exam
5. There is so much light in the city at night. We cannot see the start clearly
=> If there was so much light in the city at nigh, we couldn't see the start clearly
6. She is very shy, so she doesn't enjoy the party
=> If she was very shy, she wouldn't enjoy the party
7. People thow rubbish in the stret. The street doesn't look attractive
-> If people thow rubbish in the street , the street wouldn't look attractive
8. There are so many billboards in our city. People cannot enjnoy the view
=> If there was so many billboards in our city,people couldn't enjnoy the view
9. I don't live in a big city, so I can't go to the cinema very often
=> If I didn't live in a big city, I couldn't go to the cinema very often
10. Lan doesn't have a bike, she walk to school
=> If Lan didn't have a bike, she would walk to school

Ex1
1. If I know his telephone number, I will phone him
--> If I knew his telephone number, I would phone him
2. If it rains, we will not go to the zoo
--> . If it rained, we wouldn't go to the zoo
3. If Lan and Mai don't come here on time, we will go without them
-> If Lan and Mai didn't come here on time, we would go without them
4. If it is fine tomorrow, my sister will go camping
---> If it were fine tomorrow, my sister would go camping
5. She will go to France if she isn't very busy
--.She would go to France if she weren't very busy
6. You will be late for class if you don't hurry
---> You would be late for class if you didn't hurry
7. She will say hello to him if she sees him
---> She would say hello to him if she saw him
8. We will get the job easily if we can speak English well.
--->We would get the job easily if we could speak English well.