无论我们考的是GRE、GMAT、TOEFL还是IELTS，我们都势必会在写作当中遇到比较关系的表达
比如：
I am taller than you are.
或
I am as good as you are.
这种难度的比较句型，写起来也不需要太多思考，因为大家习惯了比较级后面紧跟than，或者as加形容词或副词之后直接跟一个than。
I learn much more from my work experience than from class.
或
The corn does not taste as good when it is just harvested as after it has been kept in the fridge for a few days.
这种难度级别的“比较句型”很多同学读起来就开始有障碍了，而写起来就更费力了。
但其实这种句子写起来是有非常标准的模式的。今天就来手把手教你怎么写出正确的比较关系。
就拿刚才第二个句子为例，我们先假想不写否定句，毕竟就是把tastes改成does not taste的问题，我们先想想它的肯定句版本怎么写出来：The corn tastes as good when it is just harvested as after it has been kept in the fridge for a few days.
Step 1
思考如果不做比较，单纯的比较双方各自的原始句子怎么写
The corn tastes good when it is just harvested.
The corn tastes good after it has been kept in the fridge for a few days.
（如果这个部分写不出来，那不是不会写比较关系的问题了）
无论是 “比较级 + than” 还是 “as + 形容词/副词 + as” 都比较的是一种程度，先找到两个句子要比较的那个程度。
在刚才的例子当中，要比的是good的程度，那么如果我们要构造比较级，等会儿肯定会变成better，如果用as … as，那等会儿肯定会有一个as good
Step 3
复刻刚才的第一个原始句子，从头到尾完整写出来，只是把那个程度词变成所需的比较版本
这很重要！很多同学写不好，就是因为他们忍不住会打断那个句子
The corn tastes better when it is just harvested …
或
The corn tastes as good when it is just harvested …
千万注意！不要写完better急着写than，或者写完as good急着写as，这是很多人写时会遇到的问题。
如果刚才写的是比较级，就在写完的部分后加than，如果刚才写的是as + 形容词/副词，同理在写完的部分后加as
The corn tastes better when it is just harvested than …
或
The corn tastes as good when it is just harvested as …
Step 5
补第二个句子，但不要再把要比的那个程度词写进去
The corn tastes better when it is just harvested than the corn tastes after it has been kept in the fridge for a few days.
或
The corn tastes as good when it is just harvested as the corn tastes after it has been kept in the fridge for a few days.
Step 6
省略两句的重复成分（注意不能引起歧义）
The corn tastes better when it is just harvested than after it has been kept in the fridge for a few days.
或
The corn tastes as good when it is just harvested as after it has been kept in the fridge for a few days.
实际上，当我真正去写一个比较句的时候，我脑子里肯定是不会需要经历这六个步骤的，我是一口气写下来的。但对于写比较句存在困难的同学，大家应该通过严格的规则反复训练，然后才能实现这种一气呵成。
句1: I have a lot of money trapped in the stock market.
句2: I spent a lot of money for my apartment.
比较的是a lot的程度，比较级其实就是more … than，或as much … as
I have more money trapped in the stock market…
I have more money trapped in the stock market than …
I have more money trapped in the stock market than I spent money for my apartment.
I have more money trapped in the stock market than I spent for my apartment.
大家自己可以自行造类似的例子，重复刚才的机械过程，然后你们会发现，Step 1到Step 5复制起来都是没有灵活余地的，这是好事。
但是Step 6其实会出现问题，那就是到底什么能省略，什么不能省略。这其实是一个大问题，而且取决于比较对象所处的句子成份。
I have more money than she has money.
=> I have more money than she does.
I have more money than does she.
更省事的做法是I have more money than her.
但这种更简化的处理并不总能做到，比如下面这个例子。
I love my father more than my mother loves my father.
=> I love my father more than my mother does.
I love my father more than does my mother.
但绝不可以简化处理为I love my father more than my mother，因为很显然，我们能看出来这个句子就有歧义了，不知道是我和我妈妈比，还是我爸爸和我妈妈比。
请格外留意刚提到的倒装处理，很多人看不懂这种倒装表达，会以为要比较的是my father和my mother。不是的，如果是比较my father和my mother，那应该是不同宾语的比较。方式见下条。
I have more knowledge than I have money.
I have more knowledge than money.
I love my father more than I love my mother.
不可以简化为I love my father more than my mother，因为和刚才主语比较省略后的形式无法区分。
只有主语不同、谓语宾语都重复；或者只有宾语不同、主语谓语都重复时：由于主语和宾语都有可能是名词，所以会存在比较对象不清楚的可能性，所以省略时是需要三思的。
The house he bought is much bigger than the house I bought is.
=> The house he bought is much bigger than (is) the one / that I bought.
Watermelons produced in relatively dry areas are generally sweeter than watermelons produced in humid areas are.
=> Watermelons produced in relatively dry areas are generally sweeter than (are) ones / those produced in humid areas.
The house he bought is much bigger now than it used to be.
为什么前面例子用的是the one或that，而这个例子用的是it呢？
因为前面例子指代的其实是不同的house，所以the one或that表示的是，我们谈论的还是同类事物（房子），但是是不同的个体。但如果我们用it，我们要讨论的具体对象也一定是没有发生变化的。
The car runs faster on smooth surfaces than the car runs on the hill.
=> The car runs faster on smooth surfaces than it does on the hill. / The car runs faster on smooth surfaces than on the hill. (注意on绝不能省略)
I love you more because you love me than I love you because you are attractive.
=> I love you more because you love me than because you are attractive. (注意because绝不能省略)
I feel happier with her than I feel with you.
=> I feel happier with her than I do with you.
=> I feel happier with her than with you. (注意with绝不能省略)
I love you more than I loved you before.
=> I love you more than I did before.
=> I love you more than before.
其实按照成份来讲，on the hill, because you are attractive, with you, before这些都是一个完整的状语成份，所以之所以不会省略掉on, because, with这些词，是因为我们要保留完整的成份，这是很多写比较句有困难的同学经常遗漏的问题。
I love you more than I hate you.
The book is more inspiring than the book is innovative.
=> The book is more inspiring than it is innovative.
I am a much better comedian than I am a writer.
I am a much better comedian than a writer（×）
前面那个句子中文很难直译，意译过来是：我作为一个喜剧家要远比作为一名作家优秀。后面那个句子就成了我比一个作家要更是一个好喜剧家了。
The book is much more thoughtful than it might seem.（后半句原始分句：It might seem that the book is thoughtful.）
The professor gave a much more insightful lecture as many students earlier expected.（后半句原始分句：Many students earlier expected that the professor would give an insightful lecture.）
You have made more mistakes than you are allowed to make.
=> You have made more mistakes than (you are) allowed (to).（后半句原始分句：You are allowed to make many mistakes.）
我们会发现，在处理比较省略时，我们需要留意是否会引起歧义，以及指代对象是否发生变化。
今天的分享就到这里啦，希望大家可以之后顺利写出正确的带有比较关系的句子！