文档介绍：Unit 1 Other countries, other cultures
Grammar and usage
Overview of subordinate clauses
What are subordinate clauses
When a number of ideas bined in one sentence, some ideas are more important than others. We can use subordinate clauses to express less important ideas. These can be divided into three kinds: adverbial, noun or attributive clauses.
The adverbial clause
状语从句种类
常考引导词
时间状语从句
when, while, as, before, after, till / until, since
地点状语从句
where
原因状语从句
because, since, as, for
目的状语从句
so that, in order that, lest, in case
方式状语从句
as, as if / though
结果状语从句
so / such…that, so that
条件状语从句
If, unless, in case, as long as
让步状语从句
although, though, as
★ When you find an interesting book in a bookshop, don’t hesitate to buy it at once.
★ Where there is waste, there is pollution.
I want to live how I want to live.
expressing time
expressing place
expressing manner
★ He left early in order that he might arrive on time.
★ She wrote the message on a piece of paper so that she didn’t forget it.
expressing purpose
expressing result
★ Some people waste food while others don’t have enough.
★ If you do have difficulties, e and ask me.
★ When in Rome, do as the Romans do.
★ Because silk paper was so expensive, people developed a kind of paper made from the fires of plants.
expressing contrast
expressing condition
expressing manner
expressing reason
1. ___the day went on, the weather got worse. (MET90) A. With B. Since C. While D. As
2. I had just stepped out of the bathroom and was busily drying myself with a towel ___ I heard the steps. (湖南卷) A. while B. when C. since D. after
状语从句疑难点(1)
(A) as, when, while的区别
D
B
3. — I'm going to the post office.
— ________ you're there, can you get me some stamps? (NMET 99) A. As    B. While   C. Because   D. If
B
as,when,while这三个词都有“当……时候”之意,但用法有所不同。when意为“在……时刻或时期”,它可兼指“时间点”与“时间段”,所引导的从句的动词既可以是终止性动词,也可是持续性动词。as意为“一边……一边……”或“与……同时”,重在表示动作同时发生、伴随进行。while只指“时间段”,不指“时间点”,从句的动词只限于持续性动词,而且主从句的时态常用进行时