原形                       过去式                   过去分词

am                               was                        been               

know                           knew                     known

are                               were                     been               

knit                            knitted, knit            knitted, knit

is                                was                        been               

hurt                             hurt                        hurt

be                               was, were              been               

hold                            held                       held  

awake                         awoke                   awaken, awaked      

hit                              hit                            hit

bear                            bore                       borne, born         

hear                             heard                     heard

become                       became                  become             

have                            had                          had

blow                            blew                       blown               

lay                               laid                          laid

break                           broke                     broken             

go                                 went                      gone