副词修饰形容词和实意动词,每个形容词都有它对应的副词,通过在词尾加ly实现.
副词修饰形容词在前,修饰实意动词在后.
He is pretty tall.(pretty为副词,修饰形容词tall)
He rans fast.(fast为副词,修饰实意动词ran)