都正确的.
记住三个词：both, all, every
当这三个词用于否定句时,都是部分否定.不管这个否定句的否定词出现在哪个位置.
如：
Not all of them are workers.= All of them are not workers. 他们并非都是工人.
Both of the men are not workers. （并非两个人都是工人）
Not every student likes English.=Every student doesn't like English.