His writing is so confusing that it's difficult to make out what it is he is trying to express.句意能看懂,但总觉得后半段“what it is he is trying to express”有点讲不通···

His writing is so confusing that it's difficult to make out what it is he is trying to express.句意能看懂,但总觉得后半段“what it is he is trying to express”有点讲不通···
His writing is so confusing that it's difficult to make out what it is he is trying to express.
句意能看懂,但总觉得后半段“what it is he is trying to express”有点讲不通···

His writing is so confusing that it's difficult to make out what it is he is trying to express.句意能看懂,但总觉得后半段“what it is he is trying to express”有点讲不通···
意思是：他写的东西很混乱,所以很难理解他在表达的东西是什么.
整体使用so……that结构,it's difficult to make out what it is he is trying to express在His writing is so confusing 这个原因下形成的一个结果状语从句,从句中it是形式主语,真正的主语是to make out what it is he is trying to express,is是从句中的系动词,difficult是从句中的表语,然后看从句中的这个真正的主语,to make out what it is he is trying to express,what it is he is trying to express做的是make out（理解,明白）的宾语从句,这个宾语从句中,主语是it,is是系动词,what是表语,he is trying to express做的是what的定语,来修饰what,因为what在定语从句中做的是express的宾语,所以定语从句引导词that可以省去.

句子没有错，是:
他写得很含糊，根本就无法知他想表达甚麼?后半句的语法啊，句子成分啊神马的求详解·····後部其实有两个句子: that it's difficult to make out 很难明白 what it is he is trying to express. 他想表达的是甚麼? 这是句倒装话，把是甚麼(what is it)放在前面。谢啦···...

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句子没有错，是:
他写得很含糊，根本就无法知他想表达甚麼?

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what it is (that) he is trying to ...
what 引导的宾语从句中 又套了一个从句，这里省略了引导词 that

make out 理解；辨认出；说明
it是从句的形式主语，he is trying to express是真正主语，省略that，是主语从句

我们只来说后边这半句啊！
首先，如果是做题的话，这题只要看明白express后缺宾语就OK啦，这样的话一定得用what.
再来分析下后边，what it is he is trying to express，这句话做了make out 的宾语。在这个宾语中又含有一个表语从句，也就是说这句话的最原本的语序应该是这样的：make out it is what he is trying ...

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我们只来说后边这半句啊！
首先，如果是做题的话，这题只要看明白express后缺宾语就OK啦，这样的话一定得用what.
再来分析下后边，what it is he is trying to express，这句话做了make out 的宾语。在这个宾语中又含有一个表语从句，也就是说这句话的最原本的语序应该是这样的：make out it is what he is trying to express。至于为什么把what 提前，我就不大清楚了。不过英语总有很多这样的例子
eg. play part in
what part did he play in the game?
虽然part提前了，但是我们还是知道这是play part in 的用法。我觉得跟这题有相似的地方吧！

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33.His writing is so confusing that it’s difficult to make out _____it is he is trying to express.
A. that B. how C. who D. what
答案：D. what
句子结构分析：
...

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33.His writing is so confusing that it’s difficult to make out _____it is he is trying to express.
A. that B. how C. who D. what
答案：D. what
句子结构分析：
第一层：这是一个含有由that引导的结果状语从句的主从复合句。
His writing is so confusing that it’s difficult to make out what it is he is trying to express.
S L P A Cl.（结果）
第二层：结果状语从句的结构是：
that it ’ s difficult to make out what it is he is trying to express
引导词 S(f) L P S(r)
第三层：在真正的主语中，有一个由what引导的宾语从句。其结构式是：
to make out what it is he is trying to express
to do O Cl.
第四层：在what引导的宾语从句中，有一个强调句式it is ... that...，只是that被省略了。
what it is he is trying to express
= what it is that he is trying to express
= it is what that he is trying to express(被强调部分是宾语what)
分析成分时，我们把强调句式it is ... that...这三个字拿掉，就成了：
what he is trying to express
what 是因为起引导作用而被提前了，还原其位置应该是：he is trying to express what
分析： he is trying to express what
S V O
在宾语中， to express what
中心词 O
这里关键是：强调句式中的that能不能省略的问题。我说可以省略的依据是：
《大学英语语法 第四版》(徐广联主编；华东理工大学出版社)PP. 903-904上有讲解和例句，现摘录几个共享：
1. It is me (that / whom) she gave the book to.
2. It is fame (that) he is seeking.
3. Who is it (that) you want to see?
4. Where was it (that) you saw the man?
整句译文：他写的东西很乱，很难弄明白想表达啥。
好了，就回答到这里，不知能不能让你满意，有疑惑我们可以继续探讨。另外，由于百度这里的文字格式输入的限制，我没有办法给你画出整个句子的结构图，望谅解。

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