is-- am-- are-- do-- go-- underpay--become-- die-- have-- wear-- leave--meet-- can-- teach-- take-- swim--ride-- say-- see-- hold--

is,am-was were did went underpaid became died had wore left met could taught took swam rode said saw held

was were were did went underpaid became dead had wore left met could taught took swam rode saied saw held

is-- was am--was are-- were do--did go-- went underpay--underpaid
become-- became die-- died have--had wear-- wore leave--left
meet--met can--could teach-- taught take--took swim--swam
ride-- rode say-- said see--saw hold--held

is--was am--was are--were do--did
go-went underpay--underpaid
become-became die-died have--had
wear-wore leave-left meet--met
can(could 可以看作其过去式，也可作为更婉转的表达词) teach-taught take-took swim-swam
ride-rode say-said see-saw hold-held