英语双重否定句我看一般语法介绍上面都说双重否定基本上是负负得正(双重否定表肯定).比如There is no quest

英语双重否定句我看一般语法介绍上面都说双重否定基本上是负负得正(双重否定表肯定).比如There is no question but he will succeed.(毫无疑问的他会成功)可是我看一些电影..他们也用双重否定,但是他们的意思好像不是表肯定...比如I aint gonna say nothing.(我什么也不说)You don't seem like you'd kill nobody.(你看起来不像杀过人)这两个意思好像不对啊.难道nothing的意思是anything而nobody的意思是anybody?