eat,think,bring,take,sing,ride,sleep,buy,build,say,fall,sell

eat--ate,
think--thought,
bring--brought,
take--took,
sing--sang,
ride--rode,
sleep--slept,
build--built,
say--said,
fall--fell,
sell--sold,
get--got,
see--saw,
make--made
不明白的再问哟,请及时采纳,多谢!