is this sentence correct "if i am alive"

kashif Mehsud
Thanks for asking me. Well, technically it's not a *sentence* because it's a subordinate clause, which means it has to be joined to a main or dependent clause to create a "true" sentence, for example "If I am alive, I breathe" or "I breathe if I am alive." (The presence of "if" is the only thing that makes "if I am alive" a subordinate or dependent clause.)
If you're asking about the grammar of the clause itself, it is correct if the clause is not meant to be hypothetical, i.e., expressing a condition that is directly contradictory to fact. That is, "If I am alive, I breathe" expresses a relation between the condition of being alive and the fact of breathing, which normally holds true for all animate life like humans.
But if you want to have the words "if I am alive" spoken by say, a vampire or a zombie, i.e., creatures whom we consider to be *not* alive, the grammar would call for "if I was alive" or "if I were alive" which would mean that I am NOT alive, in reality. For example, "If I was alive, I would breathe (but I'm not alive, so I don't breathe)." The so-called subjunctive form "were" is required in this usage under the rules of traditional, prescriptive grammar, i.e., "If I were alive, I would breathe," but "was," the normal past tense of "be" for "I," is very frequently heard in spoken English and seen in written English in such clauses.

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