She don't go to the library on Sundays.（改错）希望能帮我!

She don't go to the library on Sundays.（改错）希望能帮我!
She don't go to the library on Sundays.（改错）
希望能帮我!

She don't go to the library on Sundays.（改错）希望能帮我!
don't- doesn't 一般现在时,主语是三单she,否定句用doesn't + 动词原形

She doesn't go to the library on Sundays.

don't改为doesn't

don't 改成doesn't
she 是单数，所以do也要用三单形式。