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English definition of “be”


auxiliary verb (POSSIBLE CONDITION)   /bi/ (past tense were  /wər/ or were)
used to show the possibility of a condition or of something happening in the future : If I were afraid of you, why would I be here? If you were allowed to have one wish , what would it be? Note: In grammar, this form of be is called the subjunctive.
(Definition of be auxiliary verb (POSSIBLE CONDITION) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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