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There are many different ways to express “conditional” or “hypothetical” meaning in English. One of them is to use the word “if” in the clause that expresses the condition. For example, “If it rains, we’ll cancel the picnic. If it doesn’t rain, we won’t.” This handout explains how different verb tenses indicate different meanings when you are speaking hypothetically and should help you choose the right verb tense for the meaning you want to convey.
Most explanations of the conditional don’t use one consistent example, so it’s difficult to see how different verb tenses convey different meanings. This handout uses the same basic activity in each example (sticking your fingers into the fire) to show how the situation influences the choice of verb tense. The critical factor is the *likelihood* of the situation being real. Pay attention to the situation described before each example and notice how the verb changes as the situation becomes more and more likely.
This conditional deals with “real” conditions. We don’t call it “real” because it has already happened: we call it real because it *always* happens this way. We use this to describe a condition with an absolutely predictable result, in other words, to state a fact.
When the situation is completely likely, use present tense in both clauses.
This conditional deals with “unreal, but likely” situations in the present or future. We call it “unreal” because situation we are describing hasn’t happened yet, and “likely” because we can easily imagine it happening. We use the first conditional to describe these situations.
For example, a 3 year old child is reaching toward the fire. She hasn’t put her fingers into the fire yet, but we know that small children don’t understand fire, so we can easily imagine her touching it. We would say:
Notice that the verb “stick” is in the present tense. Using the present tense verb shows two things:
Also notice that the main clause verbs (will burn, will be crying) can be in simple form or -ing form. It depends on whether you want to emphasize a single moment in time (simple form) or the an extended period of time (-ing form). In either case, use will + verb in the main clause.
When the situation is unreal, but likely, use present tense in the conditional clause and will + verb in the main clause.
This conditional deals with situations in the present and future that are both unreal and unlikely. The situation we are describing hasn’t happened yet, and we really can’t imagine it happening very easily, except in a freak accident or a moment of great stupidity.
For example, a 25 year old is joking about reaching into the fire. He hasn’t put his fingers into the fire yet, and we don’t think he’s serious about doing it, but we want to warn him about the consequences just in case. We would say:
Notice that the verb “stuck” is in the past tense. Using the past tense verb shows two things:
Also notice that the main clause verbs (would need, would be screaming) can be in simple form or -ing form. It depends on whether you want to emphasize a single moment in time (simple form) or the an extended period of time (-ing form). In either case, use would + verb in the main clause.
When the situation is unreal and unlikely, use past tense in the conditional clause and would + verb in the main clause.
This conditional deals with situations in the *past* that are unreal—they didn’t happen. We can still imagine what the consequences would have been.
For example, the 25 year old was joking about reaching into the fire, but he didn’t actually do it. We would say:
In the next two examples, the 25 year old actually did stick his hand into the fire. The “unreal” situation is the opposite:
When the situation is unreal and in the past, use past perfect (had + -ed) in the conditional clause and would have + verb in the main clause.
In the examples of the third conditional (unreal and in the past), both the conditional clause and the main clause refer to past time: If you had done this in the past, you would have experienced this in the past.
It is also possible to mix time references—to talk about a condition in the past and the consequences in the present. For example:
Find more examples at the English Club website: http://www.englishclub.com/grammar/verbs-conditional.htm
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