| 1. |
| If she worked harder, she would succeed. |
| If she worked harder, she succeed. |
| If she worked harder, she would have succeeded. |
| If she have worked harder, she would succeed. |
| If she had worked harder, she would succeed. |
|
| 2. |
| If you arrived at the airport by 15 o’clock, you could have met her before departure. |
| If you arrived at the airport by 15 o’clock, you meet her before departure. |
| If you arrived at the airport by 15 o’clock, you could meet her before departure. |
| If you have arrived at the airport by 15 o’clock, you could meet her before departure. |
| If you had arrived at the airport by 15 o’clock, you could meet her before departure. |
|
| 3. |
| If you tried again, you pass. |
| If you tried again, you might pass. |
| If you tried again, you might have passed. |
| If you have tried again, you might pass. |
| If you had tried again, you might pass. |
|
