| Structure of first conditional | ||
| positive | negative | question |
| If I see him, I'll (I will) tell him. | If you don't hurry, you'll miss the bus. | What will you do if there is a problem? |
| First conditional - common mistakes | ||
| Common mistakes | Correct version | Why? |
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If you go to England, you will improve your English. | We use present simple in the if-clause. |
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If I find his address, I will send him the letter. | The main clause has will, which expresses certainty in the future. |
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I'll tell him as soon as I see him. | We use present simple in the if-clause. |
