因为是作状语,起强化作用修饰其后的介词短语的。
再如：(下面括号中的副词都是修饰其后的介词短语的）
The noise can be heard 【out 】in the street.
The temperature dropped 【far】 below the ordinary level.
You can not see all the animals 【all 】through the winter.
He is【exactly】 like his father
His absence from school 【mainly】due to his illness.
He is 【well】above fifty
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追问副词还修饰前面的动词把？
追答在这里是修饰后面的介词短语
追问是不是这些副词可以提到最前面然后逗号加句子。 最后一问啦
追答有这种语言现象， 但不是副词的这个用法
如一些评述性状语：
Unfortunately, I failed to see him yesterday.