| Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993. |
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| PAST PARTICIPLE |
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| is the third principal part of an English verb. In weak verbs, the pattern is glide, glided, glided; in strong verbs the pattern varies in form: it can be unchanging, as in set, set, set; it can change vowels for past tense and past participle, as in swim, swam, swum; it can change vowels and add a final -n or -en for the past participle, as in fly, flew, flown and drive, drove, driven; or it can have various combinations of these three general patterns. The forms of strong verb past participles are often in divided usage (show, showed, showed or shown; prove, proved, proved or proven). | 1 |
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| | | The Columbia Guide to Standard American English. Copyright © 1993 Columbia University Press. |
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