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  2. Action algebra - Wikipedia

    en.wikipedia.org/wiki/Action_algebra

    In algebraic logic, an action algebra is an algebraic structure which is both a residuated semilattice and a Kleene algebra. It adds the star or reflexive transitive closure operation of the latter to the former, while adding the left and right residuation or implication operations of the former to the latter.

  3. Verbal arithmetic - Wikipedia

    en.wikipedia.org/wiki/Verbal_arithmetic

    Verbal arithmetic, also known as alphametics, cryptarithmetic, cryptarithm or word addition, is a type of mathematical game consisting of a mathematical equation among unknown numbers, whose digits are represented by letters of the alphabet.

  4. Verb - Wikipedia

    en.wikipedia.org/wiki/Verb

    A verb (from Latin verbum 'word') is word that generally conveys an action (bring, read, walk, run, learn), an occurrence (happen, become), or a state of being (be, exist, stand). In the usual description of English, the basic form, with or without the particle to, is the infinitive.

  5. Uses of English verb forms - Wikipedia

    en.wikipedia.org/wiki/Uses_of_English_verb_forms

    The simple past or past simple, sometimes also called the preterite, consists of the bare past tense of the verb (ending in -ed for regular verbs, and formed in various ways for irregular ones, with the following spelling rules for regular verbs: verbs ending in -e add only –d to the end (e.g. live – lived, not *liveed), verbs ending in -y ...

  6. English irregular verbs - Wikipedia

    en.wikipedia.org/wiki/English_irregular_verbs

    [4] In some weak verbs ending in a final -t or -d, this final consonant coalesced with the weak past ending to leave a single -t or -d in the past forms. Some verbs ending in l or n had their past ending irregularly devoiced to -t, and in a few verbs ending with a v or z sound (leave, lose), both

  7. Reading - Wikipedia

    en.wikipedia.org/wiki/Reading

    Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of sight or touch. [1] [2] [3] [4]For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling), alphabetics, phonics, phonemic awareness, vocabulary, comprehension, fluency, and motivation.

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