It's easy for a child to wake up and know where they are.where引导了什么从句啊?句子中有什么需要掌握的语言点么?

问题描述:

It's easy for a child to wake up and know where they are.
where引导了什么从句啊?句子中有什么需要掌握的语言点么?

这里是宾语从句
wake up 醒来

where they are 作know的宾语 是宾语从句

where引导宾语从句,即know的宾语.
句中有It's +adj+for+sb to do sth结构.