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  2. Regular grammar - Wikipedia

    en.wikipedia.org/wiki/Regular_grammar

    Some authors call this type of grammar a right-regular grammar (or right-linear grammar) [1] and the type above a strictly right-regular grammar (or strictly right-linear grammar). [2] An extended left-regular grammar is one in which all rules obey one of A → w, where A is a non-terminal in N and w is in Σ * A → Bw, where A and B are in N ...

  3. Regular language - Wikipedia

    en.wikipedia.org/wiki/Regular_language

    In theoretical computer science and formal language theory, a regular language (also called a rational language) [1] [2] is a formal language that can be defined by a regular expression, in the strict sense in theoretical computer science (as opposed to many modern regular expression engines, which are augmented with features that allow the recognition of non-regular languages).

  4. Chomsky hierarchy - Wikipedia

    en.wikipedia.org/wiki/Chomsky_hierarchy

    Regular languages are commonly used to define search patterns and the lexical structure of programming languages. For example, the regular language = {| >} is generated by the Type-3 grammar = ({}, {,},,) with the productions being the following. S → aS S → a

  5. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    English grammar is the set of structural rules ... This has the potential to give rise to new words. For example, ... Regular verbs have identical past tense and ...

  6. Pumping lemma for regular languages - Wikipedia

    en.wikipedia.org/wiki/Pumping_lemma_for_regular...

    For every long enough string in a regular language, there must be a middle section (y) that can be repeated (or pumped) any number of times to produce a string still in the language. In the theory of formal languages, the pumping lemma for regular languages is a lemma that describes an essential property of all regular languages.

  7. List of commonly misused English words - Wikipedia

    en.wikipedia.org/wiki/List_of_commonly_misused...

    The abbreviation e.g. stands for the Latin exempli gratiā "for example", and should be used when the example(s) given are just one or a few of many. The abbreviation i.e. stands for the Latin id est "that is", and is used to give the only example(s) or to otherwise qualify the statement just made.

  8. List of English irregular verbs - Wikipedia

    en.wikipedia.org/wiki/List_of_English_irregular...

    Regular in past tense and sometimes in past participle. must – (no other forms) Defective: Originally a preterite; see English modal verbs: need (needs/need) – needed – needed: Weak: Regular except in the use of need in place of needs in some contexts, by analogy with can, must, etc; [4] see English modal verbs: ought – (no other forms ...

  9. English verbs - Wikipedia

    en.wikipedia.org/wiki/English_verbs

    A regular English verb has only one principal part, from which all the forms of the verb can be derived.This is the base form or dictionary form.For example, from the base form exist, all the inflected forms of the verb (exist, exists, existed, existing) can be predictably derived.

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