| 1.（仮定法過去） |
| 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.（仮定法過去） |
| 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.（仮定法過去） |
| 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. |
|
| 4.（仮定法過去完了） |
| If I have known earlier I could have done it. |
| If I had known earlier I could do it. |
| If I had known earlier I have done it. |
| If I knew earlier I could have done it. |
| If I had known earlier I could have done it. |
| If I had known earlier I done it. |
|
| 5.（仮定法過去完了） |
| If we haven't spent three hours in a traffic jam, we could have seen the aquarium. |
| If we hadn't spent three hours in a traffic jam, we could seen the aquarium. |
| If we hadn't spent three hours in a traffic jam, we have seen the aquarium. |
| If we hadn't spent three hours in a traffic jam, we saw the aquarium. |
| If we didn't spend three hours in a traffic jam, we could have seen the aquarium. |
| If we hadn't spent three hours in a traffic jam, we could have seen the aquarium. |
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