There must be few questions on which responsible opinion is so utterly divided a s on that of how much sleep we ought to have. 老师,请帮我分析一下语法结构,后面那个定语从句没看明白,as是干嘛用的,that指的是什么。帮我划分详细一点,谢谢
There must be few questions on which responsible opinion is utterly divided 至此为there be存在句,on which...为定语从句,修饰主语 few questions. which指代questions. 然后utterly divided 被副词so修饰,as引导比较分句在修饰so utterly divided. 注意few questions为否定意义。在否定句中 as... as... 比较结构常被so... as...结构取代,所以这个句子其实就是存在句(否定句)带了一个定语从句,定语从句中又套了一个(not)... so... as...比较结构。as从句省略了主语、系词is 和表语,只保留了主语的定语on that of how much sleep we ought to have 即that在此为名词替代词,替代名词question,即as (responsible opinion) on the question of how much sleep we ought to have (is).
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