这些旧建筑将很快为现代化的公寓所代替。
IN. 否定结构的倒装语序. 我们有时为了强调而把否定词和词组放在句首，这时句子结构应倒装。例如：
1） On no account should we follow blindly.我们决不应当盲从。
2） No where has the world ever seen such great enthusiasm for learning as in our country.没有任何其他地方有我国这样高的学习热情。

五、 含有it的结构
考生病句：
1. As is known to all of us that science and technology play an important role in the development of society.
2. It is known to us, practice makes perfect.
正确表达：
1. It is known to all of us that science and technology play an important role in the development of society. (或:As is known to all of us, science...)
2. It is known to us that practice makes perfect. (或:As is known to us, practice...)
评议与分析：
很显然，两个考生混淆了it和as的用法。如果用it作形式主语，后面的主语从句必须由that引起；如果用as，则后面不能用that，因为as是关系代词，代表practice makes perfect。It 在英语中是个相当活跃的代词，在写作中我们常要使用它。以下几种用法应熟练掌握，并能灵活运用。
1．作形式主语
It is necessary for us to master a foreign language skillfully. It makes difference whether we could purify the air or not.
2.作形式宾语
We find it rather difficult to prevent people from doing that. Modern science has made it possible for babies to grow healthily and for people to live longer.
3.引导强调句
It is only by this way that we can achieve success. It was then that people began to realize the importance of controlling population.
从语法结构来看，上述的句子都不难，或者可以说是考生相当熟悉的。然而在写作考试中，多数考生缺乏运用自己已掌握的句式的意识，而以自己头脑中拼凑的中式英语取而代之。其实，只要能恰当地运用上述的任何一个句式，考生的作文就会出现闪光点，就会取得比较好的成绩。

英语写作常见错误与分析
下面我们对一些在英语写作中典型的病句实例逐一加以剖析．

一． 不一致（Disagreements）
所谓不一致不光指主谓不一致，它还包括了数的不一致,　时态不一致及代词不一致等．
病句： When one have money, he can do what he want to.
剖析：one是单数第三人称，因而本句的have应改为has ;同理，want应改为wants.本句是典型的主谓不一致．
改为：　Once one has money, he can do what he wants (to do)
　
二． 修饰语错位（Misplaced Modifiers）
英语与汉语不同，同一个修饰语置于句子不同的位置，句子的含义可能引起变化．对于这一点中国学生往往没有引起足够的重视，因而造成了不必要的误解．
病句：I believe I can do it well and I will better know the world outside the campus.
剖析：better位置不当，应置于句末．
　
三． 句子不完整（Sentence Fragments）
在口语中，交际双方可借助手势语气上下文等，不完整的句子完全可以被理解．可是书面语就不同了，句子结构不完整会令意思表达不清，这种情况常常发生在主句写完以后，笔者又想加些补充说明时发生．
病句：There are many ways to know the society. For example by TV ,radio ,newspaper and so on .
剖析：本句后半部分＂for example by TV ,radio ,newspaper and so on .”不是一个完整的句子，仅为一些不连贯的词语，不能独立成句．
改为：There are many ways to know society ,for example ,by TV ,radio ,and newspaper.