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
