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  2. Spanish irregular verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_irregular_verbs

    There are two kinds of changes that can affect stem vowels of some Spanish verbs: diphthongization and vowel raising. Both changes affect -e-or -o-in the last (or only) syllable of a verb stem. Diphthongization changes -e-to -ie-, and -o-to -ue-. Vowel raising changes the mid vowels-e-and -o-to the corresponding high vowels: -i-and -u-respectively.

  3. Spanish grammar - Wikipedia

    en.wikipedia.org/wiki/Spanish_grammar

    To form the gerund of an -ar verb, replace the -ar of the infinitive with -ando; e.g. jugar, hablar, caminar → jugando, hablando, caminando. For -er or -ir verbs, replace the -er or -ir ending with -iendo; e.g. comer, escribir, dormir → comiendo, escribiendo, durmiendo (note that dormir undergoes the stem vowel change that is typical of -ir ...

  4. Spanish verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_verbs

    Virtually all verbs of the third conjugation (-ir), if they have an -e-or -o-as the last vowel of their stem, undergo a vowel-raising change whereby e changes to i and o changes to u, in some of their forms (for details, see Spanish irregular verbs).

  5. Spanish conjugation - Wikipedia

    en.wikipedia.org/wiki/Spanish_conjugation

    This is an Oy-Yo verb. Stem: s-, fu-, er-, se-. There are two ways to say "To be" in Spanish: ser and estar. They both mean "to be", but they are used in different ways. As a rule of thumb, ser is used to describe permanent or almost permanent conditions and estar to describe temporary ones. [11]

  6. Apophony - Wikipedia

    en.wikipedia.org/wiki/Apophony

    Navajo vowel ablaut, depending on the verb, may be a change in vowel, vowel length, nasality, and/or tone. For example, the verb stem kaah/-ką́ 'to handle an open container' has a total of 16 combinations of the 5 modes and 4 aspects, resulting in 7 different verb stem forms (i.e. -kaah, -kááh, -kaał, -kááł, -ka’, -ká, -ką́).

  7. Opinion: Why pushing STEM majors is turning out to be a ... - AOL

    www.aol.com/news/opinion-why-pushing-stem-majors...

    The number of STEM majors has surged in recent years — yet these graduates don't work in STEM occupations. Employers and investors are to blame. Opinion: Why pushing STEM majors is turning out ...

  8. Word stem - Wikipedia

    en.wikipedia.org/wiki/Word_stem

    In linguistics, a word stem is a part of a word responsible for its lexical meaning. Typically, a stem remains unmodified during inflection with few exceptions due to apophony (for example in Polish, miast-o ("city") and w mieść-e ("in the city"); in English, sing, sang, and sung, where it can be modified according to morphological rules or peculiarities, such as sandhi).

  9. Preterite - Wikipedia

    en.wikipedia.org/wiki/Preterite

    The preterite or preterit (/ ˈ p r ɛ t ər ɪ t / PRET-ər-it; abbreviated PRET or PRT) is a grammatical tense or verb form serving to denote events that took place or were completed in the past; in some languages, such as Spanish, French, and English, it is equivalent to the simple past tense.