我想问关于英语句子中

who 能衔接句子，人就用 who, 地方就用 where, 东西就用 what.
例子：the place is where i stood last night. this is what i described to you yesterday.

where 经常用在国家开头
what 经常用在名字和问东西(是什么的意思)
who 是谁的意思
how 是如何 怎样的意思
in 是用的意思
the 是这的意思

如：1.where am i?
where is he?
where are you?
where do they go
where does she go?
2.who am i?
who is she?
who are they?
who do they asked?
who does she asked?
3.what am i doing?
what ia she doing?
what arethey doing?
what do they do?
what does he do?
好好加油哦，呵呵

就像你举得例子，这种用法都属于从句。who用在定语从句，宾语从句
what宾语从句或主语从句，where用在地点状语从句较多。具体的要根据限定词来判断，你可以看一下语法书。

这是从句吧，去看看语法