i)在动词尾直接加 s。如:
play—plays, want—wants, work—works, know—knows, help—helps,get—gets
ii)以字母s、x、ch或o结尾的动词加-es;如:
guess—guesses, fix—fixes, teach—teaches, brush—brushes, go—goes,do—does,watch—watches,catch—catches
iii)以辅音字母+y结尾的动词,先变y为i,再加-es。如:
study—studies,carry—carries,fly—flies,worry—worries(别人的总结)
动词ing加法就是在表示进行时候,如果词尾是不以e结尾,就直接加,要是以e结尾,就去e加ing
参考资料:http://zhidao.baidu.com/question/8294137.html?an=0&si=1