Looking up...
She works as a teacher.
她作为一名老师工作。
表示比较或方式,"像...一样"
He runs as fast as a cheetah.
他跑得像猎豹一样快。
用于比较两个事物的程度或方式。
表示时间,"当...时"
She called me as I was leaving.
正当我要离开时,她给我打了电话。
强调两个动作同时发生。
表示原因,"因为"
As it was raining, we stayed home.
因为下雨,我们待在家里。
用于引导原因状语从句。
表示角色或身份,"作为"
He spoke as a father, not a friend.
他作为父亲,而非朋友,发表了意见。
强调某人在特定身份下的行为或言论。
表示程度,"达到...程度"
She is as tall as her brother.
她和她哥哥一样高。
用于比较两个事物的相同程度。
'as'用于比较两个同类事物(如角色、职业),'like'用于比较外观或性质。例如:'She works as a doctor'(她的职业是医生),'She looks like a doctor'(她外表像医生)。
当'as'引导时间或原因状语从句时,从句通常放在主句之前,但也可放在主句之后。例如:'As he was tired, he went to bed' 或 'He went to bed as he was tired'。
Old English 'eal swā' (just so), from 'eal' (all) + 'swā' (so). Evolved into Middle English 'as' by the 13th century.
常用于引导状语从句或比较结构。注意与'like'的区别:'as'强调比较的精确性,'like'更口语化。