有一读者问： 有这样一个句子：
(1)A big bear ran from behind a tree.
怎能将两个介词from和behind连用？
英语里两个介词连用是一常见现象。语法上唤作二重介词(double preposition),再如：
(2)The bad boy pulled his chair from under him.
(3)She does not eat much at meal times but eats a lot in between times.
(4)It allows of no freedom except in the hands of the great masters.
(5)Are you on for a row on the river?
(6)My house is over against the Beijing Hotel.
(7)Women did not gain the vote until after the First World War.
(8)The work isn't up to the standard I require.
