改错 her parents used to pround of her he is much fat than his brotherl think she is more friendly than her mother he is good at play footballhe is fat than any other boys in his class
问题描述：
改错 her parents used to pround of her he is much fat than his brother
l think she is more friendly than her mother he is good at play football
he is fat than any other boys in his class
答
her parents used to[be] pround of her
he is much [fatter] than his brother
l think she is [friendlier] than her mother
he is good at [playing] football
he is [fatter] than any other boys in his class
答
l think she is more friendly than her mother 后面+ is
he is good at play football 变成he is good at playing football (介词后面接doing）
he is fat than any other boys in his class 改成he is fatter than any other boy in his class （比较只能和一个人比,所以boy不能+s）