新版六上unit_4_I_have_a_pen_pal_B.let's learn(16)

动词的第三人称单数形式的变化规律 1.一般情况在词尾加s, like--likes 2.以o. s .x .sh. ch.等结尾的单词，加es go-- goes teach-- teaches push --pushes 3.以元音+y结尾的单词，加s play-- plays say-- says 4.以辅音字母+y结尾的单词变y为i再加es fly-- flies study-- studies 特殊: have--has