She doesn't do her homework everyday.
或She does not do her homework everyday.
方法：1.看所提供题目的时态.2.再看句中有没有情态动词,如果有,那就在情态动词后面直接加 not 变成否定句,如果要变成一般疑问句,那么就直接把情态动词提前即可.3.如果没有情态动词,看看有没有 be 动词,如果有,那就在 be 动词后面直接加 not 变成否定句,如果要变成一般疑问句,那么就直接把 be 动词提前即可.4.如果即没有情态动词又没有 be 动词,那么就要借助助动词,在这之前先分清每句的时态,如果是一般现在时,那么就要跟着人称进行相应的变化（ do / does ）,如果是过去时,只提 did 即可 ,注意,如果提出了助动词,原来的动词要变回原形.
例：1.We can go to that park with our teacher next week.
否定 句→ We can not (can't) go to that park with our teacher next week
一般疑问句 → Can you go to that park with our teacher next week?
解析：因为 can 是情态动词,所以直接在情态动词后面加 not 变为否定句,当变成一般疑问句时,只要把情态动词提前就可以了,在这道题目中,因为主语是 We ,所以在变疑问句时,要进行人称的转换.
2.She is good at dancing.
否定 句→ She is not (isn't) good at dancing.
一般疑问句 → Is she good at dancing?
解析：因为 is 是 be 动词,所以直接在 be 动词后面加 not 变为否定句,当变成一般疑问句时,只要把 be 动词提前就可以了 .
3.I wash my face every day.
否定 句→ I don't wash my face every day.
一般疑问句 → Do you wash your face every day?
解析：因为这道题中即没有情态动词又没有 be 动词,那么就要借助助动词,看到了 wash 和 every day ,知道是一般现在时,主语是 I ,所以借助助动词 do ,再在助动词后面加 not 变为否定句,变成一般疑问句时,把助动词提前,但是原来的动词要变回原形.第一人称和第三人称复数借助助动词 do .
4.He plays football on the playground after dinner every day.
否定 句→ He does not (doesn't) play football on the playground every day.
一般疑问句 → Does he play football on the playground every day?
解析：因为这道题中即没有情态动词又没有 be 动词,那么就要借助助动词,看到了 plays 和 every day ,知道是一般现在时,主语是 he ,所以借助助动词 does ,再在助动词后面加 not 变为否定句,变成一般疑问句时,把助动词提前,但是原来的动词 plays 要变回原形 play .第三人称单数借助助动词 does .