A. 一般动词在词尾加-s
help -- helps
make -- makes
B. 以s, x , ch，sh，结尾的动词在词尾加-es
fix -- fixes
teach -- teaches
wash -- washes
C. 以o 结尾的动词在词尾加-es
go -- goes
do -- does
D. 以辅音字母加y 结尾的动词，先y变为i，再加-es
fly -- flies
study -- studies
carry -- carries
E. 不规则变化
have -- has