If-sentences: real vs. unreal
VerbsRule 7 of 10
The rule
For a real future, use the present after if and "will" in the other half: "If it rains, we will cancel." For an unreal or imagined case, use the past after if and "would": "If I had more time, I would travel." Keep "will" and "would" out of the if-part in these patterns; only fixed polite phrases like "if you would follow me" break that rule.
Wrong and right
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Wrong If I will see him tomorrow, I will tell him.
Right If I see him tomorrow, I will tell him.
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Wrong If I would have more money, I would travel more.
Right If I had more money, I would travel more.
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Wrong If I am you, I would take the job.
Right If I were you, I would take the job.
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Wrong If we had left earlier, we would catch the train.
Right If we had left earlier, we would have caught the train.
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Wrong If you will heat ice, it melts.
Right If you heat ice, it melts.