1、长短句原则
一个短小精辟的句子，往往能够出其不意地起到画龙点睛的作用。如果我们把短句放在段首或者段末，也可以揭示主题：
例：
As a creature, I eat; as a man, I read. Although one action is to meet the primary need of my body and the other is to satisfy the
intellectual need of mind, they are in a way quite similar.
由此可见，长短句结合，抑扬顿挫，岂不爽哉？牢记！
建议：在文章第一段（开头）用一长一短，且先长后短；在文章主体部分，要先用一个短句解释主要意思，然后在阐述几个要点的时候采用先短后长的句群形式，定会让主体部分妙笔生辉。
2、主题句原则
国有其君，家有其主，文章也要有其主，否则会给人造成“群龙无首”之感。故意把主体隐藏在文章之内，只会让阅卷老师稀里糊涂，不知所云。所以，大家一定要写一个主题句，放在文章的开头（保险型）或者结尾，让读者一目了然，必会平安无事。
特别提示：隐藏主体句可是要冒险的！
例：
To begin with, you must work hard at your lessons and be fully prepared before the exam（主题句）. Without sufficient
preparation, you can hardly expect to answer all the questions correctly.
3、 一二三原则
考官们看文章也必然要通过明确的“标签”来判定你的文章是否结构清楚，条理清晰。
例：
1）first, second, third, last（不推荐）
2）firstly, secondly, thirdly, finally（不推荐）
3）the first, the second, the third, the last（不推荐）
4）in the first place, in the second place, in the third place, lastly（不推荐）
5）to begin with, then, furthermore, finally（强烈推荐）
6）to start with, next, in addition, finally（强烈推荐）
7）first and foremost, besides, last but not least（强烈推荐）
8）most important of all, moreover, finally
9）on the one hand, on the other hand
10）for one thing, for another thing
四、 短语优先原则
写作时，尤其是在考试时，如果使用短语，有两个好处：其一、用短语会使文章增加亮点，有助于取得高分。其二、关键时刻思维短路，只能凑字数，怎么办？用短语是一个好办法！
例：
I cannot bear it. 可以用短语表达为：I cannot put up with it.
又例：
I want it. 可以用短语表达为：I am looking forward to it.
这样会使字数明显增加，表达也更准确。
五、 多实少虚原则
原因很简单，写文章还是应该写一些实际的东西，不要空话连篇。这就要求一定要多用实词，少用虚词。我这里所说的虚词就是指那些比较大的词。比如我们说一个很好的时候，不应该之说nice这样空洞的词，应该使用一些诸如generous, humorous, interesting, smart, gentle, warm-hearted, hospital 之类的形象词。
例：
走出房间，general的词是：walk out of the room
但若小偷走出房间应该说：slip out of the room
孩子走出房间应该说：dance out of the room
老人走出房间应该说：stagger out of the room
所以，多用实词，少用虚词，文章将会大放异彩！
6、多变句式原则
1）加法（串联）
最保险的写长句的方法就是这些，可以在任何句子之间加and, 但最好是前后的句子又先后关系或者并列关系。
例：
I enjor music and he is fond of playing guitar.
如果是二者并列的，我们可以用一个超级句式：
Not only the fur coat is soft, but it is also warm.
更多短语：
besides, furthermore, likewise, moreover
2）转折（拐弯抹角）
例：
The car was quite old, yet it was in excellent condition.
The coat was thin, but it was warm.
更多的短语：
despite that, still, however, nevertheless, in spite of, despite, notwithstanding
3）因果（so, so, so）
使用关于先后或因果关系的词语。
例：
The snow began to fall, so we went home.
更多短语：
then, therefore, consequently, accordingly, hence, as a result, for this reason, so that
4）失衡句
文章中如果出现这样的句子，就更会让考官看到你的句子与众不同。其实就是主语从句，表语从句，宾语从句的变形。
例：
This is what I can do.
Whether he can go with us or not is not sure.
同样主语、宾语、表语可以改成如下的复杂成分：
When to go, Why he goes away…
5）附加（多此一举）
有关情况便是定语从句和同位语从句或者是插入语。
例：
The man whom you met yesterday is a friend of mine.
I don’t enjoy that book you are reading.
Mr liu, our oral English teacher, is easy-going.
6）排比（排山倒海句）
文学作品中最吸引人的地方莫过于此，如果非要让你的文章更加精彩的话，那么引用一个个的排比句，一个个得对偶句，一个个的不定式，一个个地词，一个个的短语，如此表达将会使文章有排山倒海之势！
例：
Whether your tastes are modern or traditional, sophisticated or simple, there is plenty in London for you.
Nowadays, energy can be obtained through various sources such as oil, coal, natural gas, solar heat, the wind and ocean tides.
We have got to study hard, to enlarge our scope of knowledge, to realize our potentials and to pay for our life. （气势恢宏）
要想写出如此气势恢宏的句子非用排比不可！
7、挑战极限原则
独立主格的句子，其实就是分词的一种特殊形式，分词要求主语一致，而独立主格则不然。
例：
The weather being fine, a large number of people went to climb the Western Hills. Africa is the second largest continent, its size being about three times that of China.
