内容正文:
状语从句是一种副词性从句,通常由一个从属连词或一个起连词作用的词组引导。状语从句分为九种:时间、地点、原因、目的、结果、条件、方式、让步和比较。
基本用法
一、时间状语从句
1.when, whenever, while, as所引导的时间状语从句
2.before,after, since所引导的时间状语从句
3.till和until所引导的时间状语从句
4.as soon as, hardly/scarcely/barely…when, no sooner…than所引导的时间状语从句
5.某些副词、名词短语所引导的时间状语从句:immediately, directly, instantly, the moment, the minute, the instant(以上都表示一……就……), each time(每次), every time(每次), next time(下次), the firs time(第一次), by the time(到……时候为止)
①He smiled politely _______ Mary apologized for her drunken friends.
A. as
B. if
C. unless
D. though
②Mary made coffee _______ her guests were finishing their meal.
A. so that
B although
C. while
D. as if
③Please call my secretary to arrange a meeting this afternoon, or _______ it is convenient to you.
A. whenever
B. however
C. whichever
D. wherever
④Peter was so excited _______ he received an invitation from his friend to visit Chongqing.
A. where
B. that
C. why
D. when
⑤You can’t borrow books from the school library _______ you get your student card.
A. before
B. if
C. while
D. as
⑥As it reported, it is 100 years _______ Qinghua University was founded.
A. when
B. before
C. after
D. since
⑦Only _______ he realized the significance of mastering two languages did he set about learning English carefully.
A. if
B. before
C. after
D. how
⑧If a lot of people say a film is not good, I won’t bother to see it, or I’ll wait _______ it comes out on DVD.
A. whether
B. after
C. though
D. until
⑨Wait _______ I turn on my computer, where there is his telephone number.
A. before
B. till
C. after
D. since
⑩Just use this room for the time being, and we’ll offer you a larger one _______ it becomes available.
A. as soon as
B. unless
C. as far as
D. until
⑪He had no sooner finished his speech _______ the students started cheering.
A. since