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English as a Second Language
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IF If (present), - will ... If (past), - conditional (would/could/might) ... If (Past Perfect), - conditional past (ex: would have done) ... If I see the first one, I will see the second one. If I saw the first one, I would see the second one. If I had seen the first one, I would have seen the second one. Absolute, Scientific Results- If a catalyst is used, the reaction occurs more rapidly.- If a catalyst is used, the reaction will occur more rapidly. Probable Results for the Future- If we find her address, we will write her.Probable Change in the Past Results- If we found her address, we would write her.- If we had found her address, we would have written her. Impossible Results- If the party were on Friday, we could go.* in this case, we use "were"(subjective) for all. For example; - If she were here, I would talk to her. - If it were black, I would see it.
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