状语从句在复合句中充当状语，由从属连词引导，用于修饰主句。
状语从句省略后，剩余句子意思明了，而名词性从句省略后，剩余句子意思不完整。You should work hard whatever you do. whatever you do是状语从句You should do whatever I do. whatever I do是名词性从句。
