1. If you don't leave the building immediately, I'll call security.

2. If Simon had not been ill, he would have gone to the party.

3. I wish he had taken your advice.

4. If he knew her problem, he would help her.

5. Unless you study harder, you'll fail in the next exam.

6. If he had hurried, he would not have missed the train.

7. I wish you had told us about this.

8. If I knew English, I could apply for that job.

9. If it had not been rained, we would have gone.

10. I wish you had given a chance to tell you the truth./ I wish I had told you the truth.

1)If you don't leave the building immediately, I'll call security.

2)If Simon hadn't been ill,he would have gone to the party

3)I wish (that) he had taken your advice

4)If he knew her problem,he would help her.

5)Unless you study harder,you'll fail in the next exam.

6)If he had hurried,he wouldn't have missed the train.

7)I wish you had told us about this.

8)If I knew English,I could apply for that job.

9)If it had not been rained,we would have gone.

10)I wish you had given a chance to tell you the truth

Giải thích:Cứ áp dụng các công thức là ra+xem nó đang ở thì nào

Gợi ý:Công thức if loại 2:If+S+were/$V_{2/ed}$ +....,S+could/would+$V_{1}$ 

                           If loại 3:If+S+had+$V_{3/ed}$ +.........,S +could/would+have+$V_{3/ed}$

Công thức wish ở quá khứ:S + wish(es) + (that) + S + had + V3(khẳng định)

Công thức:Unless=If.......not....