while引导的条件状语从句和 as long as 引导的条件状语从句有什么区别?

while: 当...的时候； 然而；引导时间状语从句和比较状语从句
如：Mother was cooking while father was watching TV.
He likes reading while other boys like playing .
as long as 只要,引导条件状语从句
如：As long as you study hard,you will pass the exam.