e. g. help - helps climb - climbs talk - talkssing - singstell - tellsswim - swimsrun - runsenjoy - enjoys2. 以s, x, ch, sh, o结尾的动词加es; 如果词尾已有e, 直接加s teach - teaches guess - guesseswash - washes watch - watchesgo - goes do - doesclose - closes dance - danceslove - loves like - likes3.以辅音字母 + y结尾的动词, 变y为i后, 加es study - studies try - tries fly - flies