__(luck)for him,he has passed the exam

问题描述:

__(luck)for him,he has passed the exam

Luckily 副词作状语.可是后面有for him啊,为什么不能用luck或lucky副词才能作状语。luck or lucky 都不行。这是很常用的一种说法。看下面的例子。
Baidu is a product of its market, and--luckily for baidu--its market is massive.