介词 连词 副词 连接句子时的区别?
介词不可以连接句子,它只能连接短语,如果短语是动词开头,动词用ing形式的,
eg.according to the report
连词连接句子或短语,连接句子或短语时都不加逗号,
eg.Flowers will die if you don't water them.
副词连接句子时,在副词后加逗号,此时的副词通常用于修饰整个句子,
eg.Luckily,I won the game at last.很幸运的,我在最后赢得了比赛.