强调句型与定语从句的区别.如题.

强调句和定语从句最大的区别在于,强调句去掉it is...that/who后剩下的成份仍是一个句子.如刚才的例子,去了it was..who后,就成了Smith sent me the letter.也是个句子,而且句意不变.
例如:It was in this room [that] he wrote this magnificent works.这是个强调句,而变为定语从句时则是,It was in this room [which] he wrote this magnificent works.括号的部分是区别所在,不能相互替换．而原句里,who既可用在强调句里,也可用在定语从句里,因此也就导致2种不同情况的出现!2种句子翻译上会有不同,主要体现在语序上．做强调句解时：是Smith送我去的医院；而做定语从句解时：送我去医院的人是Smith．