英语中主语为第三人称单数,即he,she,it和单名词时,动词用单数形式。方法是: 动词以o,s,x,ch,sh结尾的加es,如Tom washes coat every day. 动词以辅音字母加y结尾的,变y为i加es,如He carries water for the oId man.其他情况一般直接加s.如My sister speaks English every day.