原形 过去式 原形 过去式 原形 过去式 原形 过去式
sweep swept teach taught have had go went
keep kept think thought do did find found
sleep slept buy bought eat ate say said
feel felt drink drank is/am was take took
read read give gave are were mean meant
put put sing sang drive drove meet met
cut cut begin began speak spoke make made
let let ring rang write wrote see saw
fly flew run ran ride rode come came
draw drew sit sat hear heard tell told
grow grew learn learned/ learnt get got know knew