只要提起写作文，老师都会要求我们要做到“逻辑严谨”“结构完整”。
对于语文作文，想做到这点其实是挺难的，因为中文是意合语言，要考虑到每两句话之间内在的逻辑。
但是在写英语作文的时候则容易得多！
因为英语是一种“形合语言”，我们所需要做的就是运用“换词大法”将作文从形式上+内容上进行全面升级！
首先我们来看一看如何在形式上运用“换词大法”，我们将目前常用的过渡词根据具体用法的不同，分成九类。
此时的“换词”意味着扔掉你那干瘪生硬的英语，在句子之间加上一些“过渡词”，让句子在形式上更完整。
1、解释过渡词
如果刚刚写完一句话，然后想解释一下，那么你要用到的是“解释过渡词”：now, in addition, for, in this case, furthermore, in fact ，这类过渡词能够有效增加语句的说服力，同时增加文章字数。
事实上，英语本身就是一种“解释型语言”（汉语是一种“定义型语言”），解释过渡词用得好不好，直接体现了你的英语硬实力！
（1）The problem, in this case, is hard to solve.
（2）Furthermore, several people telephoned the same night.
2、时间过渡词
在记叙文里面，时间顺序是最重要的顺序；
在图表文中，也常用表示时间的过渡词来加强数据之间的联系以说明变化规律！
如下，是关于家庭消费结构变化的作文。
The average family income in our Kangming City increased from 8,000 yuan per year in 1998 to 20,000 yuan in 2008.
In the meantime, the structure of the average family expenses has changed, too.
These graphs show the change clearly.
下面这句是大家常用的“现象解释型”议论文的开头模式：
Recently, we have made a survey of the people on physical training.
Only 35 percent of the people surveyed have taken part in physical activities.
3、强调过渡词
如果你说完一个道理，感觉表达的不完整，想要强调一下，那么你应该使用“强调过渡词”，如：certainly, indeed, above all, surely, most important
（1）Indeed, a dessert is always enjoyable.
（2）Above all, do not build an open fire in a forest.
4、转折过渡词
【but, however, although, though, yet, except for 】
（1）Yet there was still a chance that he would win.
（2）Except for one girl, all the hikers returned.
5、举例过渡词
【for example, for instance, thus, such, next 】
（1）For instance, a telegram often costs more than a telephone call.
（2）Thus the trip finally began.
6、递进或补充过渡词
【in addition，furthermore，also，moreover，yet 】
（1）In addition, the tour stops in Vancouver.
（2）Furthermore, the time for registration has been extended.
7、顺序的过渡词
【first, second, third, afterward(s)（后来）, meanwhile（几乎同时）, thereafter （在那以后）, last, finally, eventually（终于） 】
（1）First, you mail in an application. Second, you ask for an appointment. Third, you send them three personal references.
（2）Then you come to a traffic light and turn right.
8、比较过渡词
【like, in the same way, similarly, equally important, too 】
（1）In the same way, we look for a good doctor.
（2）Similarly, the Thais enjoy spicy foods.
9、对比过渡词
【unlike, in contrast, whereas, on the other hand, instead 】
（1）In contrast, the red fluid does not lose its color.
（2）The husband wanted a boy, whereas the wife wanted a girl.
此外，从内容上进行“换词”也必不可少，毕竟很多同学都面临着词汇量匮乏的情况，那些用到“恶心”的词语如何才能华丽大转身呢？
我们可以先看看此种“换词大法”的三点注意事项，打起精神来牢记吧！
【注1】拒绝冗长，力求实用！听我一席话，省下十本书！
【注2】箭头左边是原词，右边是推荐的换词，有多个换词的一般按照难易程度排列，可以按照你目前的英文水平选择一两个使用。
【注3】如果一篇文章里面同一个词要用两次以上，优先使用换词，换词不够了可以用原词，原词尽量往后用但是不要用在结尾句。
10、换词大法
1. like → be fond of/be crazy about/delight in/rejoice in/take pleasure in/appreciate/
2. all + 名词复数（如students）→ every single student
【注意名词单复数变化】
3. think about/consider → take into account
4. want to do sth → intend to do sth/tend to do sth/be inclined to do sth./ be longing for doing sth./be thirst for doing sth
5. more and more+n. → n.+in /growing/increasing/significant/numbers
6. more and more +adj (如important) → increasingly important
7. most+n.(如student) → an overwhelmingly majority ofa significant proportion of a sizable percentage of
8. not → by no means的不完全倒装句型。
【例】By no means shall we give up trying.我们决绝能停止努力。
【注】by no means 可以用在“正装”句型中，如：This is by no means a good way to solve the problem. 这绝不是解决问题的最好方法。
9. should do → be supposed to do
10. good --> excellent
11. want sth→desire sth. 高级词汇使情感强度更加具体
12. but→nevertheless/nonetheless 高级词汇使情感强度更加具体（“尽管如此，但是...”）How things have changed!(大转折，用于句首，替换But.)
13. always →consistently /constantly/continually/eternally/perpetually
14. enough → abundant/adequate/sufficient
15. important →essential/vital/crucial/fundamental/indispensable
16. now → nowadays/these days/ recently
17. really →undoubtedly/absolutely 18. very → extremely/surprisingly //unusually/excessively/noticeably/exceedingly
19. many → a number of/ plenty of/ a multitude of/ many+n.+,if not most,+...(经典插入语)
20. good friend→ true friend/close friend/constant friend/a friend indeed
21. big → distinct 清楚的、明显的 （可以加到difference/change等词的前面）
