used when you are comparing two people, things, situations etc 像，如同〔用于比较〕
Please let me know your decision as soon as possible (= as soon as you can ) .
请尽快告诉我你的决定。
His last album sold half a million copies and we hope this one will be just as (= equally ) popular.
他上一张专辑售出50万张，我们希望这张同样畅销。
as ... as
Tom’s not as old as you, is he?
汤姆年纪没有你大，是吗？
an old woman with hair as white as snow
一位白发如雪的老太太
Some of the doctors are paid almost twice as much as the nurses.
有些医生的薪水几乎是护士的两倍。
We work as hard as any other team in England.
我们同其他英格兰球队一样努力。
2
used to say what job, duty, use, or appearance someone or something has 作为；身为
As a parent, I feel that more should be done to protect our children.
身为家长，我觉得应采取更多措施来保护我们的孩子。
A flat stone was used as a table.
一块扁平的石头被用作桌子。
Dad dressed up as Santa Claus.
爸爸打扮成圣诞老人。
3
used to say what someone thinks or says a person or thing is 当作
The problem is regarded as serious.
这个问题被认为很严重。
The result of last week’s election will be seen as a victory for the right-wing government.
上周选举的结果将被视为右翼政府的胜利。
He’s described as being in his late teens, tall, and of slim build.
据描述，他十八九岁的样子，瘦高个儿。
4
when someone was in a particular age group 在某一年龄段时
As a young man, Eliot had studied art in Paris.
年轻时，艾略特在巴黎学画画。
I’ll take you to all the places I loved as a girl.
我会带你去我小时候爱去的每一个地方
