sweep-sweeps-sweeping
set-sets-setting
use-uses-using
wait-waits-waiting
like-likes-liking
wash-washes-washing
pass-passes-passing
come-comes-coming,
wear-wears-wearing,
feed-feeds-feeding,
walk-walks-walking,
worry-worries-worrying
单三形式的以y结尾的看相连字母的发音,如果是辅音,就要改y为i再加es
现在分词以e结尾的去掉e再加ing