，使文章结构紧凑。
常用连接词：
1.表文章结构顺序：first of all，firstly/first，secondly/second…
and then，finally，in the end，at last
2.表并列补充关系的：what ismore，besides，moreover，furthermore，inaddition
3.表转折对比关系的：however，on the contrary，but
although+clause( 从句)，in spite of+n/doing
on the one hand…
on the other hand…
some…，while others…
4.表因果关系的：because，as
so，thus，therefore，as a result
5.表换一种方式表达：in other words
6.表进行举例说明：for example，句子;for instance，句子;such as+n/doing
7.表陈述事实：in fact
8.表达自己观点：as far as i know，in my opinion
9.表总结：in short，in a word，in conclusion，in summary
文中正确使用两三个好的句型，如：宾语从句、状语从句、动名词做主语等。
宾语从句举例：i believe tianjin will be more beautifulandprosperous.
状语从句举例：if everyone does something for the environment, ourhometown will beco