关系代词whom,which,that在限制性定语从句中作动词宾语或介词宾语,而该介词由位于从句末尾时才省略,而AS就不省略,请问这句话是什么意思啊 ,能举个例子吗?

关系代词whom ,which, that 在从句作介词宾词时,关系代词不能省略,请举例说明!然后看看这个句子,那个which为什么又可以省略?The situation (which) they had got into was very dangerous. 关系代词的具体用法比如which、who、whose、where、that、whom什么时候使用具体解释. 关系代词that who whom whose which 和关系副词where when why的用法如何区分? 在什么情况下关系代词作宾语不能省略除了“介词+whom/which结构”以外 who,which,that,whose和whom的用法这几个关系代词用法有什么区别?请举例! what是关系代词吗平时都说是,但是百度百科里说“关系代词有that, which, who, whom, whose, as等,绝对没有what ”,是什么回事啊 看到关联词中分关系代词和关系副词,他们在引导从句时候有什么区别么?关系词：引导定语从句的关联词成为关系词 关系词有关系代词和关系副词.关系代词有that,which,who,whom,whose,as等；关系 “介词+关系代词“引导的定语从句,关系代词可以是whom,which还有什么? 关系代词who,whom,that的选用和省略 在宾语从句中如何正确使用that,who,which,whom,(还有哪些关系代词).比如a teacher is a person who teaches.我是怕复杂点的用成：a teacher is a person that teaches. 定语从句的关系代词的区别比如说which whom what whose that? 还有什么 in which=when at which=where 一句话如何使用这些关系代词 高一英语关系代词的用法比如说,what where which that whom这些在句子里都怎么用,还有怎么从从句中看出用哪个,在从句中做什么成分的时候用哪个, 我对关系代词和关系副词在从句中做主语不太懂,请举几个例子说明.哪些可被that代替?在定语从句中,关系代词和副词听说加起来一共是十个：which that whose why where when who whom as how 请问是不是 定语从句.但是关系代词在从句中作为was 的表语时,不能用which只能用that那么先行词是物呢?是不是也这样 比如 he is not the man whom he was 关系代词whom,which,that在限制性定语从句中作动词宾语或介词宾语,而该介词由位于从句末尾时才省略,而AS就不省略,请问这句话是什么意思啊 ,能举个例子吗? In the dark street ,there wasn't a single person__ __ she could turn for help.用关系代词:who,whom,which,that,whose,when,where,why填空 .当关系代词在定语从句中做表语 ,为什么用that 不用which 在定语从句中出现who或which关系代词是否应该用that?