Be (verb) 

Semantical notes

1. To exist. "I want only to be, and that is enough." "God is" (a way some theists assert their theism). "There's no sense in making a scientific inquiry about what species the Loch Ness Monster is, without first establishing that the Loch Ness Monster indeed is."
2. Identity. "I only want to be myself." "When the area behind the dam fills, it will be a lake." "The Morning Star is the Evening Star." "Boys will be boys." "I yam what I yam" (Popeye).
3. Class membership. To belong to a set or class: "She could be married." "Dogs are canines." "Moscow is a large city."
4. Predication (property and relation attribution): "It hurts to be blue." "Will that house be big enough?" "The hen is next to the rooster." "I am confused." Such attributes may also relate to temporary conditions as well as inherent qualities: "I will be tired after running." "Will you be going to the play tomorrow?" (In this latter form, some grammarians might consider "be going" single verb phrase with "be" as a "helper verb", while others consider the gerund "going" to be used as an adjective describing a condition parallel to the "tired" example. This latter interpretation is more consistent with other Germanic languages).

In ontology, philosophical discussions of the word "be" and its conjugations takes place over the meaning of the word is, the third person singular form of 'be', and whether the other senses can be reduced to one sense. For example, it is sometimes suggested that the "is" of existence is reducible to the "is" of property attribution or class membership; to be, Aristotle held, is to be something. Of course, the gerund form of "be," being, is its own (vexed) topic: see being and existence.

Usage in different languages

In Indo-European languages, the words meaning "to be" and "to eat" (originating in stems *es and *ed, respectively) often sound similar to each other. Due to the high frequence of their use, their inflection retains a considerable degree of similarity in some cases. Thus, for example, the English form "is" is an apparent cognate of Russian yest' , in spite the fact that the two belong to language groups that had split at least three thousand years ago and have had very little interaction since (20th century borrowings notwithstanding).

Other languages have multiple words for the verb "to be", dividing its uses in different ways. For example, the Japanese language has two forms: "arimasu" for the existence, and "desu" for identity and the property-possession uses.

The Spanish language also has two words, but divided differently: "ser" for uses expressing permanence (whether existence or attributes) and "estar" primarily for temporary conditions, either of existence or attributes. These are the kinds of issues that make machine translation difficult. For example, the English sentence "I am strong" would become two different Spanish sentences depending on whether the speaker intended to express that this was an inherent quality he possessed ("Soy fuerte"), or a present condition based on circumstances ("Estoy fuerte").

Finally, the divisions often have exceptions.

To say that "a book is on the table", for example, Japanese would use the "arimasu" form, saying "Hon wa, taberu ni arimasu," meaning roughly "as for the book, there exists on the table", while Spanish would use the "estar" form "El libro está en la mesa", meaning roughly "the book presently possesses the property of being on the table" (this is so even for things that are always where they are - La Torre Eiffel está en París.)

In the Russian language, the verb byt' is the infinitive of "to be." The third person singular, yest' means "is" (and, interestingly enough, it is a homonym of the infinitive "to eat"). As a copula, it can be inflected into the past (byl), future (budet) and subjunctive (byl by) forms. A present tense (yest' ) exists, however it isn't used as a copula, but rather omitted altogether or replaced by the verb yavlatsa (to be in essence). Thus one can say:

• Ona byla krasivoy - she was beautiful (adjective in instrumental case[?])
• Ona krasivaya - she is beautiful (adjective in the nominative case)
• Ona yavlayetsya krasivoy - she is beautiful (adjective also in instrumental)

But not

• *Ona yest' krasivaya - she is beautiful (no such form)

The E-Prime language, based on English, simply avoids the issue by not having a generic copula. It requires instead a specific form such as "remains", "becomes", "lies", or "equals".

See also ontology; grammar; copula.

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