如何把一个句子改写成主语从句、宾语从句、表语从句

Question

求五个例子

Answer 1

where引导主语从句：
where he comes from is unknown. 他从哪里来还不清楚。

where宾语从句：
i want to know where he comes from. 我想知道他从哪里来。

which引导定语从句：
the city which i want to visit is Dalian. 我想参观的城市是大连。

where引导表语从句：
the question is where he comes from? 问题是他从哪儿来。