swam  - swim,caught - catch,see-saw,eat ate,i walk she walks,ran - run,wrote-write,got-gets,think thought,swam-swim,barks-barked,won-winning,go going,run - ran.,walkes, walked,skip skipping,say said,eat - ate.,swam - swim,then-know,looked-looks,had - has,bought-buys,break - broke.,i walk - i walked,teach-taught,