纯情小泰伦
on no account, by no means, impossible, never, never ever(比never要强烈),under no circumstances, in no way, must not, 再给几个比较口语化的:till the ass ascends the ladder(等到驴都会爬梯子了), not for keeps(for keeps是永远,加上not就是永远不啦)

猪猪侠xtt
决不的英语短语是definitely not。
重点词汇解释
definitely
英 ['defɪnətli] 美 ['defɪnətli]
adv. 肯定地;当然地;明确地
例句:All the students that work hard can definitely pass the exam.
翻译:用功的学生必能通过考试。
短语:state definitely 明确地阐述
近义词
absolutely
英 ['æbsəluːtli] 美 ['æbsəluːtli]
adv. 完全地;绝对地;[语]独立地
int. (表示赞同)完全正确,一点没错
例句:It is difficult to cross the desert by car, but not absolutely impossible.
翻译:开车穿越沙漠很难,但并非完全不可能。
短语:absolutely normal number 绝对范数