English verbs
Verbs constitute one of the main parts of speech in the English language. Like other types of words in the language, English verbs are not heavily inflected. Most combinations of tense, aspect, mood and voice are expressed periphrastically, using constructions with auxiliary verbs. Generally, the only inflected forms of an English verb are a third person singular present tense form ending in -s, a past tense, a past participle, and a form ending in -ing that serves as a present participle and gerund. Most verbs inflect in a simple regular fashion, although there are about 200 irregular verbs; the irregularity in nearly all cases concerns the past tense and past participle forms. The copula verb be has a larger number of different inflected forms, and is highly irregular. Although many of the most commonly used verbs in English come from Old English, many others are taken from Latin or French. Nouns or adjectives can become verbs. Adjectives like "separate" and "direct" thus became verbs, starting in the 16th century, and eventually it became standard practice to form verbs from Latin passive participles, even if the adjective didn't exist. Sometimes verbs were formed from Latin roots that were not verbs by adding "-ate", or from French words. For details of the uses of particular verb tenses and other forms, see the article Uses of English verb forms.
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