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3、地点状语从句:引导地点状语从句的连词有where或wherever.
例如:
Where there is no air or water, nobody can live.
4、条件状语从句:引导条件状语从句的连词有if/unless等。
(1)在含有if引导的条件状语从句的主从复合句中,主句谓语部分通常含有will/shall或情态动词,从句用一般现在时表示将来时态。
例如:
We will go for a picnic if it does not rain tomorrow.
(2)if……not常译作“如果不…”,相当于unless, unless含有否定意义,译作“假如不”,“除非”。
例如:
You will fail if you do not work hard.
You will fail unless you work hard.
(3)用if改写“祈使句+and+简单句”这一句子结构中的祈使句时,要在祈使句前加if you,并去掉并列连词and.
例如:
Use your head, and you’ll work out the physics problem.
If you use your head, you’ll work out the physics problem.
If you study hard, you will catch up with us.
(4)用if……not改写“祈使句+or+简单句”这一结构中的祈使句时,要变祈使句为否定的条件状语从句,并去掉or.
例如:
Study hard, or you won’t catch up with your classmates.
If you don’t study hard, you won’t catch up with us.
5、目的和结果状语从句:引导目的状语从句的连词有so that;引导结果状语从句的连词有so …that…,such…that….
(1)so 是副词,修饰形容词或副词。
So +adj./adv. +that
例如:The shoes are so small that I can not wear them.
(2)such是形容词,修饰名词。
such+a/an+adj. +n(可数名词单数)+that…
such+adj. +n(不可数名词单数,可数名词复数)+that…
例如:
She is such a lovely girl that we all like her.可改为:She is so lovely a girl that we all like her.
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