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"As"一词在英语中扮演着多重角色,包括连词、副词、介词以及关系代词,对高考考生而言至关重要。下面将详细介绍其不同功能及应用场景。
1. 表示时间关系和伴随状态
原因: As the society develops, our life is improving continually. (随着社会发展,我们的生活日益改善)
此外,as 还可以表达原因,与 because, since, as 及 for 区别如下:
- because 最强烈,常用于 why 引导的疑问句回答;
- since 次之,表示对方已知的原因,意为“既然”;
- as 类似于 since,强调明显的或已知的原因,亦可与 since 互换使用;
- for 是并列连词,语气最弱,补充说明原因。
2. 让步状语从句引导词
尽管语气稍弱,as 仍可用于让步状语从句,且要求倒装结构(形容词/名词/副词/动词原形 + as + 主语 + 谓语):
- Young as he is, he speaks several languages fluently. (他虽年轻,却能流利地说多种语言)
用于形容词或副词前,表示比较意义:
He earns less money than me. (他挣得比我少)
Run as quickly as possible! (请尽快跑!)
1. 指身份或角色:
He worked as a teacher at the high school. (他在一所高中担任教师)
As a student, it's our duty to study diligently. (身为学生,我们应勤奋学习)
2. 像,如同:
The boys were dressed up as clowns. (男孩们装扮成了小丑)
1. 限定性定语从句中的关系代词:
He isn't such a poor man as he appears. (他并不像看起来那样穷困)
Your blouse is different from the one I own. (你买的衬衫与我的不同)
2. 非限定性定语从句中的关系代词:
As we all know, music plays a pivotal role in our lives. (众所周知,音乐在我们的生活中举足轻重)
需要注意的是,as 和 which 在引导非限制性定语从句时,as 强调“正如”,位置灵活;而 which 强调“这,这一点”,通常置于句末。
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