(讲)-2017年高考英语一轮复习讲练测(原卷版)
状语从句
一考点梳理。
1.考查in case引导的状语从句
根据语境的不同,in case既可表示“如果”、“万一”,引导条件状语从句:也可表示“以防(万一)”,引导目的状语从句。
【例】 Leave your key with a neighbor____you lock yourself out one day.
A. ever since
B.even if
C.soon after
D. in case
答案为D。in case在此引导目的状语从句。句意为:给你的邻居留一把钥匙,以防哪天你把自己锁在外面。
【例】My parents live in a small village. They always keep candles in the house__there is a power cut.
A. if
B.unless
C.in case
D. so that
答案为C。in case在此引导目的状语从句,意为“以防”。
2.考查before引导的状语从句
尤其要注意“It+be+--段时间+before...”这一句型。
【例】 The field research will take Joan and Paul about five months; it will be a long time____we meet them again.
A. after
B.before
C.since
D.when
【例】He was told that it would be at least three more months____he could recover and return to work.
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