1.He kept the money without someone knowing where it was.
问题描述：
1.He kept the money without someone knowing where it was.
为什么without后用knowing而不是用know?
2.Does it matter if he can’t finish the job on time?
为什么用it it的用法是?
答
without用作介词 此时加动名词!
it作虚拟主语 指代较长句子“ if he can’t finish the job on time”