brukjan - inf - Skeirns. III, 6 brukeiþ - 3 pers, sing, pres, indicat - Tim. I, I, 8
brukjam - 1 pers, pl, pres, indicat - Cor. I, X, 17
brukjais - 2 pers, sing, pres, optat - Tim. I, V, 23
brukjaima - 1 pers, pl, pres, optat - Cor. II, III, 12
brukjaidau - 3 pers, sing, mediopass, optat - Coloss. II, 22
brukei - 2 pers, sing, imper - Cor. I, VII, 21
bruhta - 1 pers, sing, p, indicat - Cor. II, I, 17
brukjands - pres.p.- Skeirns. V, 3
4.2.1. (b) I class weak irregular verbs
Some weak verbs of this class (e.g. brukjan (to use, employ), bugjan (to buy), þagkjan (to think), þugkjan (to think, consider; to seem); waúrkjan (to make, do; to work) and oth), whose stems ended in velar consonants k, ŋ, g, formed their past tense by means of the suffix -ta (while the verbal stem lost the marker of this class -j-); the combination of this velar consonat and the consonant -t of the suffix resulted in -ht-: bugjan → bauhta, brūkjan → brūhta, waúrkjan → waúrhta. In addition, in verbs þagkjan, þugkjan [-ŋkjan], the nasal consonant -ŋ- was dropped and the stem vowel became lengthened, which resulted in the following past tense forms of these two verbs: þāhta and þūhta. The past tense of the verb borrowed from Greek kaupatjan (to buffet, slap) is kaupasta [<*kaupat + -ta].
Past tense/preterite forms of the preterite-present verbs have the same structure.
| I class irregular |
infinitive | preterite singular | preterite plural | past participle |
| to think | þagkjan | þāhta | þāhtēdum | þāhts |
| to make, do; to work | waurkjan | waurhta | waurhtēdum | waurhts |
See the complete paradigm of the conjugation of weak verbs
