Conditional Sentence type 3 Type of Conditional Sentence
3 Modal Verbs
We can use may, might, and could in the conditional clause of type 1 conditional sentences to show that something possible consequence. We can also use might and
could in place of would in type 2 and 3 conditional sentence.
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It can be seen from following examples:
If you listen to me carefully, you may learn something useful. If I were a bird, I could fly home.
If you had told me about your problem, I might have been able to help you.
Other examples with the same pattern as follows:
I can bring something to eat if you want. If john should call, tell him I will be back around five.
4 Omitting If
We can express a condition with should or the subjunctive were by inverting the subject and verb. But an if-clause is more common, especially in informal English.
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It can be seen from the following examples:
1. A. If I were you, I would not to do that. B. Were I you, I would not do that.
were I you = if I were you. 2. A. If I had known, I would have told you.
B. Had I known, I would have told you. had I known = if I had known.
3. A. If anyone should call, please take a message. B. Should anyone call, please take a message.
should anyone call = if anyone calls
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Martin Parrot, Loc.Cit.
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John Eastwood, Oxford Guided to English Grammar New York: Oxford University Press, 2002, p.338