Ann had a lot of trouble because she lost her passport last week. (1 Điểm) If Ann had lost her passport last week, she would have had a lot of trouble. If Ann didn't lose her passport last week, she wouldn’t have a lot of trouble. If Ann hadn’t lost her passport last week, she wouldn’t have had a lot of trouble. If Ann lost her passport last week, she would have a lot of trouble. 2.He doesn’t get a job, so he can’t pay his bills. (1 Điểm) If he had got a job, he could have paid his bills. If he had not got a job, he could not have paid his bills. If he got a job, he could pay his bills. If he did not get a job, he could not pay his bills. 3.Because she sits too much, she isn’t fit. (1 Điểm) If she sat too much, she would not be fit. If she hadn't sat too much, she would have been fit. If she had sat too much, she wouldn't have been fit. If she didn’t sit too much, she would be fit. 4.Because you helped me, I could manage it . (1 Điểm) If you had helped me, I could have managed it. If you hadn’t helped me, I couldn’t have managed it. If you helped me, I could manage it. If you didn't help me, I couldn’t manage it. 5.I was sick yesterday, so I didn’t go to class. (1 Điểm) If I had been sick yesterday, I wouldn't have gone to class. If I hadn’t been sick yesterday, I would have gone to class. If I were sick yesterday, I would not go to class. If I were not sick yesterday, I would go to class. 6.Because he isn’t hungry, he doesn’t eat fish. (1 Điểm) If he were hungry, he would eat fish. If he were not hungry, he would not eat fish. If he had been hungry, he would have eaten fish. If he had not been hungry, he would not have eaten fish. 7.Tom doesn’t do it because you don’t tell him what to do. (1 Điểm) If you had told Tom what to do, he would have done it. If you had not told Tom what to do, he would not have done it. If you did not tell Tom what to do, he would not do it. If you told Tom what to do, he would do it. 8.Sue walked to work in the rain so she caught a cold. If Sue hadn’t walked to work in the rain, she wouldn’t have caught a cold. If Sue had walked to work in the rain, she would have caught a cold. If Sue didn’t walk to work in the rain, she wouldn’t catch a cold. If Sue walked to work in the rain, she would catch a cold 9.The traffic was very bad so we were late. If the traffic hadn’t been very bad, we wouldn’t have been late. If the traffic had been very bad, we would have been late. If the traffic weren’t very bad, we wouldn't be late. If the traffic were very bad, we would be late. 10.We didn’t hurry, so we were late for the concert. If we had not hurried, we would have been late for the concert. If we had hurried, we wouldn’t have been late for the concert. If we hurried, we would not be late for the concert. If we did not hurry, we would be late for the concert.

If Ann had lost her passport last week, she would have had a lot of trouble.
If Ann didn't lose her passport last week, she wouldn’t have a lot of trouble.
If Ann hadn’t lost her passport last week, she wouldn’t have had a lot of trouble.
If Ann lost her passport last week, she would have a lot of trouble.
2.He doesn’t get a job, so he can’t pay his bills.
(1 Điểm)
If he had got a job, he could have paid his bills.
If he had not got a job, he could not have paid his bills.
If he got a job, he could pay his bills.
If he did not get a job, he could not pay his bills.
3.Because she sits too much, she isn’t fit.
(1 Điểm)
If she sat too much, she would not be fit.
If she hadn't sat too much, she would have been fit.
If she had sat too much, she wouldn't have been fit.
If she didn’t sit too much, she would be fit.
4.Because you helped me, I could manage it .
(1 Điểm)
If you had helped me, I could have managed it.
If you hadn’t helped me, I couldn’t have managed it.
If you helped me, I could manage it.
If you didn't help me, I couldn’t manage it.
5.I was sick yesterday, so I didn’t go to class.
(1 Điểm)
If I had been sick yesterday, I wouldn't have gone to class.
If I hadn’t been sick yesterday, I would have gone to class.

If I were sick yesterday, I would not go to class.
If I were not sick yesterday, I would go to class.
6.Because he isn’t hungry, he doesn’t eat fish.
(1 Điểm)
If he were hungry, he would eat fish.
If he were not hungry, he would not eat fish.
If he had been hungry, he would have eaten fish.
If he had not been hungry, he would not have eaten fish.
7.Tom doesn’t do it because you don’t tell him what to do.
(1 Điểm)
If you had told Tom what to do, he would have done it.
If you had not told Tom what to do, he would not have done it.
If you did not tell Tom what to do, he would not do it.
If you told Tom what to do, he would do it.
8.Sue walked to work in the rain so she caught a cold.
If Sue hadn’t walked to work in the rain, she wouldn’t have caught a cold.
If Sue had walked to work in the rain, she would have caught a cold.
If Sue didn’t walk to work in the rain, she wouldn’t catch a cold.
If Sue walked to work in the rain, she would catch a cold
9.The traffic was very bad so we were late.
If the traffic hadn’t been very bad, we wouldn’t have been late.
If the traffic had been very bad, we would have been late.
If the traffic weren’t very bad, we wouldn't be late.
If the traffic were very bad, we would be late.
10.We didn’t hurry, so we were late for the concert.
If we had not hurried, we would have been late for the concert.
If we had hurried, we wouldn’t have been late for the concert.
If we hurried, we would not be late for the concert.
If we did not hurry, we would be late for the concert.       

Ann had a lot of trouble because she lost her passport last week.
(1 Điểm)
If Ann had lost her passport last week, she would have had a lot of trouble.
If Ann didn't lose her passport last week, she wouldn’t have a lot of trouble.
If Ann hadn’t lost her passport last week, she wouldn’t have had a lot of trouble.
If Ann lost her passport last week, she would have a lot of trouble.
2.He doesn’t get a job, so he can’t pay his bills.
(1 Điểm)
If he had got a job, he could have paid his bills.
If he had not got a job, he could not have paid his bills.
If he got a job, he could pay his bills.
If he did not get a job, he could not pay his bills.
3.Because she sits too much, she isn’t fit.
(1 Điểm)
If she sat too much, she would not be fit.
If she hadn't sat too much, she would have been fit.
If she had sat too much, she wouldn't have been fit.
If she didn’t sit too much, she would be fit.
4.Because you helped me, I could manage it .
(1 Điểm)
If you had helped me, I could have managed it.
If you hadn’t helped me, I couldn’t have managed it.
If you helped me, I could manage it.
If you didn't help me, I couldn’t manage it.
5.I was sick yesterday, so I didn’t go to class.
(1 Điểm)
If I had been sick yesterday, I wouldn't have gone to class.
If I hadn’t been sick yesterday, I would have gone to class.
If I were sick yesterday, I would not go to class.
If I were not sick yesterday, I would go to class.
6.Because he isn’t hungry, he doesn’t eat fish.
(1 Điểm)
If he were hungry, he would eat fish.
If he were not hungry, he would not eat fish.
If he had been hungry, he would have eaten fish.
If he had not been hungry, he would not have eaten fish.
7.Tom doesn’t do it because you don’t tell him what to do.
(1 Điểm)
If you had told Tom what to do, he would have done it.
If you had not told Tom what to do, he would not have done it.
If you did not tell Tom what to do, he would not do it.
If you told Tom what to do, he would do it.
8.Sue walked to work in the rain so she caught a cold.
If Sue hadn’t walked to work in the rain, she wouldn’t have caught a cold.
If Sue had walked to work in the rain, she would have caught a cold.
If Sue didn’t walk to work in the rain, she wouldn’t catch a cold.
If Sue walked to work in the rain, she would catch a cold
9.The traffic was very bad so we were late.
If the traffic hadn’t been very bad, we wouldn’t have been late.
If the traffic had been very bad, we would have been late.
If the traffic weren’t very bad, we wouldn't be late.
If the traffic were very bad, we would be late.
10.We didn’t hurry, so we were late for the concert.
If we had not hurried, we would have been late for the concert.
If we had hurried, we wouldn’t have been late for the concert.
If we hurried, we would not be late for the concert.
If we did not hurry, we would be late for the concert.