例子：
Give me one good reason why I should help you..可以还原成以下两个简单句
1. Give me one good reason.
2. I should help you for the reason.
I don’t know the reason why you quarreled with him 可以还原成以下两个简单句
1. .I don't know the reason.
2. You quarreled with him.
why,引导的定语从句怎样还原成两个简单句?