一、灵活使用“There be”结构。
【考生病句】
1. There are many people like to go to the movies.
2. There are different kinds of vegetables can be bought on the market by people.
【正确表达】
1．There are many people who like to go to the movies.
2．There are different kinds of vegetables that people can buy on the market.
【点评】这两个例句错误比较有普遍性，因为在历次考试中有不少考生不能正确运用there be这一最常用句式。在这种结构中，there是引导词，没有实际意义。be在句中作谓语，有时态和数变化。
例如：
1．There is not a moment to be lost.
2．There are many people rushing into the cities every year.
3．There are many things we can do to prevent traffic accidents.
4．There is no use holding back the wheel of history.
从以上例句还可看出，句中主语后面可接多种修饰语，如介词短语、不定式短语、定语从句、分词短语等等。这无疑使该结构增加了表现力，使句子表达内容更加丰富。 在运用这一结构时，考生最容易犯错误的是在there be之后又加了一个动词作谓语，使句子结构出现严重错误。这里列举考生典型错误均属这种情况，对此我们在写作中要格外注意。

二、准确使用比较结构。
【考生病句】
1．Comparing with the bike, the car runs much faster.
2．The climate in Walton is colder than other cities.
【正确表达】
1．Compared with the bike, the car runs much faster.
2．The climate in Walton is colder than that of other cities.
【点评】许多考生在作文中用compare或than表示比较，但有很多人经常用错。在考生病句第1句中，句子主语是the car，是用来比较的对象。改为Compared with A, B...;在例2中，考生误将“天气”与“城市”进行比较，比较的对象不是同类事物，只有将后者改为“其他城市的天气”才符合逻辑，很显然，考生错误是受了汉语表达习惯影响。

比较结构是常用结构，正确地使用这一结构可以使文章句式变化，提高写作水平。下面是比较结构一些常用表达方法。
1）同级比较
In 1998 we produced as many cars as we did in the previous five years.
We have accomplished as much in the past three years as would have taken ten years in the past.

2）比较级
Children now enjoy better medical treatment than before.

3）最高级
This is the most interesting book I've ever read.

4）the more…，the more…结构
The harder you work, the greater progress you will make.

5）选择比较
I prefer staying at home to going out.
He prefers to work alone.
They prefer to work rather than (to) sit idly.

6)对比
Motion is absolute while stagnation is relative.
He is tired out, whereas she is full of vigour.
注意：while 和whereas均可用于连接两个意义对立分句，相当于汉语“而”字。