(时间、地点、原因、条件)状语从句 Adverbial Clause
状语从句在整个复合句中起状语作用,用来修饰主句中的动词、形容词或副
词等。状语从句根据它表达的意思可分为时间、地点、原因、目的、结果、
上步、比较和条件等类别。
1.时间状语从句
引导时间状语从句常见的连接词有when, before,afer, while, since,ill
unil, as soon as等。如:
When he was6 years ole, he moved to China with his parents.当他16岁的时
后,他和父母一起来到中国。
While Jim was listening to the radio, there was a knock at the door.当吉姆正
在听收音机的时候,有人敲门。
As soon as I got into the classroom, the class began.我刚一到教室,就开始
上课了。
He has lived here since he became a teacher.他从当老师起就住在这里
She didn't go home until she finished her homework.她完成作业后才回家。
注意:当主句是一般将来时态时,时间状语从句中使用一般现在时表示将
来的含义,如
vill tell you when I get there我到那里时,我会告诉你的。
2.地点状语从句
常由 where, wherever等连接词引导。如:
They'll go where teachers are neede.他们将到需要教师的地方去
Wherever he goes, he always carries his schoolbag.他无论去哪儿都带着书
包
3.原因状语从句
常由 because,as, since等连接词引导。如:
Since you need a good rest, you should not watch TV too late.由于你需要好
好休息,看电视不要看得太晚。
He was late for school because he missed the early bus因为他错过了早班车
他上学迟到了
as, since, because这三个连接词都可以引导原因状语从句,如果“原因
构成主句含义的主要起因,通常用 because。如:
He was not at school yesterday because he was il他昨天没上学是因为他生
病了。
如果“原因”不构成主句的主要起因,就用as或 since。如:
As it was getting late, he began to think of going home.天色晚了,他便想起了
回家。
Since we are students, we should study hard.我们是学生,我们应该努力学
习。
4.条件状语从句
常由if, unless等连接词引导。如:
If you have any questions to ask, you can call me up.你如果有问题要问,你
可以给我打电话。
She will go to plant trees with us unless she is not at home.如果她在家就会和
我们一起去植树。
注意:条件状语从句与时间状语从句一样,从句中谓语动词用一般现在时
表示将来。如
If it is fine,, we will go to the park.如果是晴天,我们将去公园。
He won' catch the train in time, unless he takes a tari他不能赶上火车了
除非他乘出租车。
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