请问句中的介词about指什么?The two things 【about】 which Marx was not sure were the grammar and some of the idioms. 马克思不大有把握的两个方面是语法和某些习惯用语是不是这样?如下：
问题描述：
请问句中的介词about指什么?
The two things 【about】 which Marx was not sure were the grammar and some of the idioms. 马克思不大有把握的两个方面是语法和某些习惯用语
是不是这样?如下：
答
介词about是与句子中的was not sure相关，即Marx was not sure about...
about which Marx was not sure是一个定语从句，修饰前面的the two things，即the two things是定语从句的先行词，短语中定语从句充当介词about的宾语。关系代词which在这里指代the two things
答
翻译正确The two things about which Marx was not sure were the grammar and some of the idioms.主语 the two things谓语 were定语 about which Marx was not sure 表语 the grammar and some of the idiomsabout...