Do - did - done, Be - was/were - been, Come - came - come, Know - knew - known, Sing - sang - sung, Speak - spoke - spoken, Sit - sat - sat, Teach - taught - taught, Blow - blew - blown, Dream - dreamt - dreamed, Receive - received - received, Leave - left - left, Spend - spent - spent, Fly - flew - flown, Grow - grew - grown, Swim - swam - swum.