四级常用连接词，用来表达先后次序关系：at this time; first; second; at last; next；previously; simultaneously; eventually；last but not least；to begin with；to start with；to end with；finally；seeing...；since then；first of all；afterwards; following this; preceding this.
英语四级常用连接词
1. Moreover
2. Furthermore
3. In addition
4. Additionally
5. However
6. Nevertheless
7. Nonetheless
8. On the contrary
9. Conversely
10. In contrast