Regular models
Variants of the regular models
Irregular past tense models
to costinvariableto feedvowel: long > shortto findi > outo know[o, a] > eto mean+tto panic-c- > -ck-to pay-ay > -aidto send-d > -tto singi > a, uto show> -ed, -nto sticka > u, i > uto sleep-ee_ > -e_tto speak> o_e, o_ento spell> -ed, -tto take-ake > -ook, -akento think> -oughtto wear-ear > -ore, -ornto write-i_e > o_e, i_en