什么是关系副词？和关系代词一样，关系副词也是引导定语从句的。关系代词或关系副词所引导的句子，修饰前面的先行词。
通过下面的句子来看看关系副词是如何产生的。
This is theplace. 这是那个地方。
I was born intheplace. 我在那里出生。
将两个句子合成一个简练的句子。
This is theplace I was born intheplace. (×)
→ 不能直接将两个句子首尾相接。
This is the place and I was born in the place. (√)
→ 加上连词and的句子是正确的，但是不够简练。
This is theplace I was born inwhich. (×)
→ the place是名词，所以可以用关系代词which代替，但关系代词放在句末是错误的。
This is theplacewhich I was born in. (√)
→ 起连词作用的关系代词which放在定语从句前，才是正确的表达。
This is theplaceinwhich I was born. (√)
→ 也可以把介词移到关系代词前。
This is theplacewhere I was born. (√)
→ 可以用关系副词where代替in which。
“介词+关系代词（in which）”可以换成关系副词where。所以，“介词+关系代词”可以用关系副词代替。
再来看下面的例句。
This is theplace. 这是那个地方。
I was born there. 我在那儿出生。
将这两个句子合成一个简练的句子。两个句子中相同的部分是the place和there。
This is theplace I was born there. (×)
→ 不能直接将两个句子首尾相接。
This is theplaceand I was born there. (√)
→ 加上连词and是正确的句子，但不够简练。
This is theplace and I was born where. (×)
→ 用关系副词where代替副词there，但是不能放在定语从句的句末。
This is theplacewhere I was born. (√)
→ 关系副词where放在前面引导定语从句，才是正确的句子。
√where起连接两个句子的连词作用，但它不是代替名词，而是代替副词there，所以，where是同时起连词和副词作用的关系副词。（
and + there → where）
√ 除所有格关系代词外，that可以代替主格和宾格关系代词，同样that也可以代替关系副词。
（1）that代替关系代词
This is theplacewhich I was born in.
→ 关系代词
whichThis is theplacethat I was born in.
→ 关系代词that
（2）that代替关系副词
This is theplacewhere I was born.
→ 关系副词
whichThis is theplacethat I was born.
→ 关系副词that
关系副词和关系代词的原理相同，但是略微复杂一点。
关系代词在句子中代替名词，如果去掉关系代词就不是完整的句子。
→ 介词后必须有名词，但在这个句子中，介词in后没有名词，所以不是完整的句子。
但是，关系副词代替的是起修饰作用的副词，所以去掉关系副词，后面的句子依然是完整的。
→ 是完整的句子。理解了这一点，在以后解答问题或是阅读理解时才能判断出是省略了关系代词还是关系副词，这也是解答选择关系代词或关系副词问题的重要线索。
