主语单三人称时的动词变化在中,当主语为时,动词要用“s”型i)在动词尾直接加 s。如:playplays, wantwants, workworks, knowknows, helphelps,ii)以字母s、x、ch、sh或o结尾的动词加-es;如:guessguesses, fixfixes, teachteaches, wash-washes, gogoes,dodoes,watchwatches,catchcatchesiii)以y结尾的动词,先变y为i,再加-es。如:studystudies,carrycarries,flyflies,familyfamilies, cry-cries强调如何将主语是的变为否定和疑问句。注:1、除三单外,其他人称的特殊疑问句:特殊疑问词加do来提问。如:What do you have? Where do they live? (除三单外其他人称包括I,we,you,they,my friends,his parents,Mike and Davis,my dogs.)