1、i变a式beginbegan ring-rangsit-sat sing-sang swim-swam give-gavedrink-drank (2)o变a式comecame become-became aught式catch-caught teach-taughtought式buy-bought bring-broughtthinkthought(5)d变t式buildbuilt lendlentspendspent send-sent(6) ow变ew式knowknew grow-grew throw-threw blow-blewdraw-drew (7)ay变aid式pay-paid
2、 say-said(8)ell变old式tell-told sell-sold(9)i变o式writewrote drivedrove riderode riserosewin-won(10)eep变ept式keep-kept sleep-sleptsweep-swept feel-felt(11)eak变oke式speakspoke breakbroke(12)e变o式get-got forget-forgot(13)and变ood式stand-stood understand- understoodAA不变式beatbeat cost-costcut-cut hit-hithurthurt let-letput-put read-readsetset shut-shut不规则：can-could eat-ate find-foundfly-flew go-went hear-heardleave-left lose-lost meet-metrun-ran wear-wore
