1.Tom isn't in my place,so he doesn't understand If Tom... 2.We can't go because it is raining If... 3.Unless there is so much traffic,the air won't be polluted If... 4.If it doesn't rain,there will be a shortage of water Unless... 5.Unless she starts at once,she will be late If... 6.If she doesn't hurry,she will miss the train Unless... 7.The weather is not fine.We can't take photographs If... 8.You press the button to stop the machine If... 9.We don't have enough money so we can't buy that house If... 10.If someone doesn't put the coal in,the fire will go out Unless...

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1. If Tom were in my place, he would understand.

2. If it weren't raining, we could go.

3. If there isn't so much traffic, the air won't be polluted.

4. Unless it rains, there will be a shortage of water.

5. If she doesn't start at once, she will be late.

6. Unless she hurries, she will miss the train.

7. If the weather were fine, we could take photographs.

8. If you press this button, the machine stops.

9. If we had enough money, we could buy that house.

10. Unless someone puts the coal in, the fire will go out.

Câu đk loại 0: If S Vs/es, S Vs/es

Câu đk loại 1: If S Vs/es, S will/can V

Câu đk loại 2: If S V2/ed, S would/could V