像第三人称单数后面动词加s的语法全告诉我

一般情况下,词尾加S,如；like----likes,want----wants.
以s,x,ch,sh,o结尾的加es 如,watch---watches,go---goes,teach---teaches.
还有以y结尾的归两大类,1.元音+y要加s,如play----plays
2.辅音+y要变y为i+es如study---studies