| walk | walks | walked| walking | walked
| be | is | was,were | being | been
| | go | goes | went | going | gone
| | begin | begins | began | beginning | begun
| | build | builds | built| building | built
| do | does | did | doing | done
| | feel | feels | felt| feeling | felt
| have | has | had| having | had
hit| hits | hit| hitting | hit
| win | wins | won| winning | won
| know | knows | knew | knowing | known
| | mow | mows | mowed | mowing | mown
| run| runs | ran | running | run
| sing | sings | sang | singing | sung
| | think | thinks | thought| thinking | thought
| Notes:
The pattern of walk is used for all regular
English verbs. Be is the most irregular of all English verbs.
Unlike all others, its third person singular form is not related to the
base form, and it uses forms other than the base form
(am, are) for other present singular persons and the plural. It
also distinguishes between singular (was) and past
(forms) of the simple past. Go is the only other verb
whose past form (went) is completely unrelated to the base form.
Some other irregular verbs use -n endings for past participles,
form the simple past and/or participle by vowel change, or repeat the base
form. The remaining verbs on the table above illustrate some of the
possibilities.
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