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  2. Affirmation and negation - Wikipedia

    en.wikipedia.org/wiki/Affirmation_and_negation

    In English, negation is achieved by adding not after the verb. As a practical matter, Modern English typically uses a copula verb (a form of be) or an auxiliary verb with not. If no other auxiliary verb is present, then dummy auxiliary do (does, did) is normally introduced – see do-support. For example, (8) a. I have gone (affirmative) b.

  3. Positive semidefinite - Wikipedia

    en.wikipedia.org/wiki/Positive_semidefinite

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  4. Positive operator - Wikipedia

    en.wikipedia.org/wiki/Positive_operator

    In mathematics (specifically linear algebra, operator theory, and functional analysis) as well as physics, a linear operator acting on an inner product space is called positive-semidefinite (or non-negative) if, for every ⁡ (), , and , , where ⁡ is the domain of .

  5. Polarity item - Wikipedia

    en.wikipedia.org/wiki/Polarity_item

    An affirmation is a positive polarity item, abbreviated PPI or AFF. A negation is a negative polarity item , abbreviated NPI or NEG . The linguistic environment in which a polarity item appears is a licensing context .

  6. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    A Grammar of the English Language, In a Series of Letters: Intended for the Use of Schools and of Young Persons in General, but more especially for the use of Soldiers, Sailors, Apprentices, and Plough-Boys. New York and Chicago: A. S. Barnes and Company. Cobbett, William (2003) [1818]. A Grammar of the English Language (Oxford Language ...

  7. Grammatical modifier - Wikipedia

    en.wikipedia.org/wiki/Grammatical_modifier

    Another type of modifier in some languages, including English, is the noun adjunct, which is a noun modifying another noun (or occasionally another part of speech). An example is land in the phrase land mines given above. Examples of the above types of modifiers, in English, are given below. It was [a nice house].

  8. Grammatical mood - Wikipedia

    en.wikipedia.org/wiki/Grammatical_mood

    English has indicative, imperative, conditional, and subjunctive moods. Not all the moods listed below are clearly conceptually distinct. Individual terminology varies from language to language, and the coverage of, for example, the "conditional" mood in one language may largely overlap with that of the "hypothetical" or "potential" mood in ...

  9. English auxiliary verbs - Wikipedia

    en.wikipedia.org/wiki/English_auxiliary_verbs

    The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...