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2013英语四级考试语法让步状语从句
让步状语从句
常见的连接词有though, although，as, while, even though
区分though，although，as
eg：Although/though he is a child, he can live by himself.
as 表示虽然的时候，要进行倒装;
Child as/though he is , he can live by himself.
eg：Although/though she works very hard ,she makes very little progress.
Hard as she works, she makes very little progress.
Although/though she is young, she has travelled to many countries to put shows .
Young as she is, she has travelled to many countries to put shows .
while：连接两个句子，表示虽然，但是;
eg：He is experienced while he is young.
真题分析：
1.The anti-virus agent was not known
(直到一名医生偶然发现了它)
until a doctor find it by chance.
2.I would prefer shopping online to shopping in a department store because __________(它更加方便和省时)
it is more convenient and timesaving.
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