be
UK[biː]US[bi]
v
To exist or live.
v
To occur or take place.
v
Used to indicate identity, quality, or condition.
aux
Used with a past participle to form the passive voice.
aux
Used with a present participle to form the continuous tenses.
Etymology
The verb 'be' has one of the most complex histories in the English language, being a fusion of several ancient roots. Its infinitive form descends from the Proto-Indo-European bheuə-, meaning "to grow" or "to become," which evolved into the Old English 'bēon.' Meanwhile, its present tense forms (am, is, are) stem from different PIE roots meaning "to be." Over centuries, these distinct verbs merged into a single, irregular paradigm to fulfill the essential grammatical function of expressing existence, identity, and state. This suppletion, where a single verb's conjugation is supplied by historically unrelated words, is a common feature in Indo-European languages for core, frequently used concepts.
Analysis
The modern English verb 'be' is a suppletive verb, meaning its various forms (am, is, are, was, were, been) are derived from three distinct Proto-Indo-European roots. The infinitive 'be' and the forms 'am', 'is', and 'are' originate from the PIE root bheuə-, h₁es-, and h₂er- respectively, which all converged in meaning "to be" or "to become." Its functional role is as the primary copula and existential verb in the language.
Examples
To be or not to be, that is the question.
The meeting will be in the main conference room.
She wants to be a doctor when she grows up.