① 一般情况下，直接在词尾加“s”

⑴ jump–jumps

⑵ write-writes

⑶ read-reads

② 以 s/x/o/sh/ch 结尾的动词，加“es”

⑴ guess-guesses

⑵ fix-fixes

⑶ wash-washes

⑷ do-does

⑸ go-goes

⑹ watch-watches

③ 以辅音字母＋y 结尾的动词，把y改i加es

⑴ fly-flies

⑵ study-studies

⑶ carry- carries