work hard,or you will not pass the exam 其中还有的语法这个句子的语法 和（If you don't work hard you will not pass the exam）句子可以互换

（If you don't work hard you will not pass the exam 中式用法
正宗的用法还是
work hard,or you will not pass the exam

条件状语从句

这是
【祈使句,and + 陈述句（常用will + 动词原形）】句型
在这个句型中,前面的祈使句表条件
如：
Work hard,and you'll catch up with him.
=If you work hard,you'll catch up with him.
补充：如果条件部分带否定意味,中间并列连词用or,即：
【祈使句,or + 陈述句（常用will + 动词原形）】
如：
Work hard,or you won't catch up with him
=If you don't work hard,you won't catch up with him.