副词可以修饰动词，形容词，其它副词以及其他结构
He runs fast
She is very beautiful
The work very hard
副词的位子： 1 根据情况，放在助动词之后，实意动词之前或之后 2 形容词之前，其它副词之前或之后 3 多个助动词时，副词一般放在第一个助动词后
He speaks very fast
They have already left
The have already been repaired
常用的频度副词（always, usually, often, sometimes, never...）的位置通常放在一般动词前面，be动词后面，助动词和实意动词之间
They always come early
Sam often writes homework at 7:00