把下列句子合并成一个宾语从句（每空一词）
Does he live there? I want to know ...
I want to know ____ ____ ____ there.

Does he live there?为一般疑问句，充当宾语从句时，连接词要用whether或if。后边要用陈述语序，所以将助动词does去掉，live用第三人称单数lives。变化后为I want to know whether/if he lives there.

略