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Verbs have traditionally been defined as "action" words or "doing" words. The verb in the following sentence is rides:
We can achieve a more robust definition
of verbs by looking first at their formal features.
Here are some examples of verbs in sentences:
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-ate | concentrate, demonstrate, illustrate |
-ify | clarify, dignify, magnify |
-ise/-ize | baptize, conceptualize, realise |
Base Form | + | Inflection | ||
[1] She |
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to work by train |
[2] David |
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in the choir |
[3] We |
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five miles to a garage |
[4] I |
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a meal for the whole family |
These inflections indicate TENSE. The -s inflection indicates the PRESENT TENSE, and the -ed inflection indicates the PAST TENSE.
Verb endings also indicate PERSON. Recall that when we looked at nouns and pronouns, we saw that there are three persons, each with a singular and a plural form. These are shown in the table below.
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1st Person | I | we |
2nd person | you | you |
3rd Person | he/she/John/the dog | they/the dogs |
In sentence [1], She travels to work by train, we have a third person singular pronoun she, and the present tense ending -s. However, if we replace she with a plural pronoun, then the verb will change:
The verb travel in [1a] is still in the present tense, but it has changed because the pronoun in front of it has changed. This correspondence between the pronoun (or noun) and the verb is called AGREEMENT or CONCORD. Agreement applies only to verbs in the present tense. In the past tense, there is no distinction between verb forms: she travelled/they travelled.