连词“conjunction” 是用来连接词与词，短语与短语以及句与句的词。如：and, for, but, or, nor, so, yet, however,therefore 等。副词“adverb”是用来修饰动词和形容词或其它副词 的词。如：now, then, suddenly, normally, fast，how, when, where, why, whether等。
