Agirlheardamuffledcrycomingfrombehindoneofthewalls.既然from作介词,那后面应该跟名词,为什么可以加behind?此句出自新概念,

Question

A girl heard a muffled cry coming from behind one of the walls.既然from作介词,那后面应该跟名词,为什么可以加behind?此句出自新概念,

Answer 1

英语中有时会出现两个介词连用的情况,可以将第二个介词引出的短语看作第一个介词的宾语.例如：
Choose a book from among these.
He jumped from behind the tree.
He waited there until after 8:00.
这样的介词叫二重介词.
常见的二重介词有：
from under（从...的下面）；
from behind（从...的后面）；
until after（直到...之后）；
from among（从...当中）