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  2. Infrared spectroscopy correlation table - Wikipedia

    en.wikipedia.org/wiki/Infrared_spectroscopy...

    similar conjugation effects to C═O C≡N unconjugated 2250 medium conjugated 2230 medium R─N─C (isocyanides) any 2165–2110 R─N═C═S (isothiocyanates) any 2140–1990 C─X: fluoroalkanes: ordinary 1000–1100 trifluoromethyl 1100–1200 two strong, broad bands chloroalkanes: any 540–760 weak to medium bromoalkanes: any 500–600

  3. Spanish verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_verbs

    The "stemless" verb ir belongs to this group, with yendo. For -er and -ir verbs whose stem ends in ñ or ll , the -iendo ending is reduced to -endo: tañer → tañendo, bullir → bullendo. [4] The gerund has a variety of uses and can mean (with haciendo, for example) "doing/while doing/by doing/because of one's doing/through doing" and so on.

  4. Spanish irregular verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_irregular_verbs

    Vowel raising appears only in verbs of the third conjugation (-ir verbs), and in this group it affects dormir, morir, podrir (alternative of the more common pudrir) and nearly all verbs which have -e-as their last stem vowel (e.g. sentir, repetir); exceptions include cernir, discernir and concernir (all three diphthongizing, e-ie).

  5. Spanish conjugation - Wikipedia

    en.wikipedia.org/wiki/Spanish_conjugation

    How is my Spanish: Spanish conjugation charts Spanish conjugation chart. Chart to conjugate in 7 different Spanish tenses. SpanishBoat: Verb conjugation worksheets in all Spanish tenses Printable and online exercises for teachers and students... Espagram: verb conjugator Spanish verb conjugator. Contains about a million verb forms.

  6. Spanish grammar - Wikipedia

    en.wikipedia.org/wiki/Spanish_grammar

    Note that (1) for -ar and -ir verbs (but not -er), the first-person plural form is the same as that of the present indicative; and (2) -er and -ir verbs share the same set of endings. Imperfect or "copretérito"

  7. French conjugation - Wikipedia

    en.wikipedia.org/wiki/French_conjugation

    Conjugation is the variation in the endings of verbs (inflections) depending on the person (I, you, we, etc), tense (present, future, etc.) and mood (indicative, imperative, subjunctive, etc.). Most French verbs are regular and their inflections can be entirely determined by their infinitive form.

  8. Interlingua grammar - Wikipedia

    en.wikipedia.org/wiki/Interlingua_grammar

    The table at the right shows the main verb forms, with examples for -ar, -er and -ir verbs (based on parlar 'to speak', vider 'to see', and audir 'to hear'). The simple past, future, and conditional tenses correspond to semantically identical compound tenses (composed of auxiliary verbs plus infinitives or past participles).

  9. Imperfect - Wikipedia

    en.wikipedia.org/wiki/Imperfect

    There are only three irregular verbs in the imperfect: ir, ser, and ver. Historically, ir — unlike other Spanish " -ir verbs" — failed to drop the -b- of the Latin imperfect. The imperfect of ser is likewise a continuation of the Latin imperfect (of esse ), with the same stem appearing in tú er es (thanks to pre-classical Latin rhotacism ).