副词性质的连接词不能连接两个分句或引导从句。
它们引导的句子之间往往用逗号隔开。
副词性质的连接词在写作中常常使用，主要分为以下几类：1.表示顺序关系
如 first, in the first place, then, finally, in the end等。
尤其要注意then：【错误】He graduated from college in 2003, then he found a job.
【正确1】He graduated from college in 2003, and thenhe found a job.【正确2】He graduated from college in 2003. Then he found a job.
大家在使用then的时候可别犯迷糊啊，用得好就是送分句，用不好那可就是送命句了。
2.表示递进关系
如in addition, what is more, furthermore, moreover等。
尤其要注意in addition 与in addition to 的区别：
【错误】There is, in addition to,one further point to make.
【正确】There is, in addition,one further point to make.
in addition 是副词性质；
in addition to是介词性质，后面必须接宾语。
这两者就像是是冷酷girl与邻家女的区别。
3.表示转折关系
如however, nevertheless, nonetheless, on the contrary, in contrast等。
尤其要注意不要把however 当成连词：【错误】In 2003, the United States launched the war on Iraq on account of Iraq possessing weapons of mass destruction (WMD), however,no WMD has been found in Iraq so far.
【正确】In 2003, the United States launched the war on Iraq on account of Iraq possessing weapons of mass destruction (WMD). However,no WMD has been found in Iraq so far.
