连词与副词有何区别?

只有连接词（连词）才能连接句子（除了句子,它们还能连接单词和短语）。比如,--My brother and I went shopping yesterday。(连接单词brother以及I)--Working hard and playing happily are both important to me。(连接短语working hard以及playing happily)--I'm seventy years old but I have a young heart。(but 连接两个句子)副词在句子里仅仅修饰动词、形容词、其他副词以及全句。--He walked quicky towards her。(quickly修饰动词walk)--He is very handsome。（very修饰形容词handsome）--He speaks En glish very well。(副词very修饰副词well)--He sang the song whole-heartedly。（whole-heartedly修饰全句