1 As Kofi Anna，Secretary General of the United States said，“each contribution -- how small -- can help make a difference.”
2 Now she is spending a year in remote part of southwest China working as a volunteer teacher in a village school.
这些句子都与 as的用法有关。作为介词使用， as在第一句中是一个关系代词，引导定语从句，意思是“是”；而在第二句中， as是一个介词，做介词，“是”。
1.Child as he is，he knows a lot.
2.Tired as they were，they stayed up late preparing for the coming exams.
3.Try as he would，he failed again this time.
考例：1.(2005重庆)___，he talks a lot about his favorite singers after class.
A.A quiet student as he may be
B.Quiet student as he may be
C.Be a quiet student as he may be
D.Quiet as he may be a student
2.(2005.广东)____. Carolina,couldn't get the door open.
A.Try as she might B.As she might be C.She might as try D.Might she as try
(解析)答案是 A。as引导让步状语，动词 try指向 as前的原形。
1.He is very careful，as his work shows.
2.As is known is reported in the newspaper，talks between the two countries are making progress.
考例：(2005浙江)___I explained on the phone，your re quest will be considered at the next morning.
When B. After C. As D. Since
2.(2006)The Beatles，____many of you are old enough to remember，came from Liverpool.
A. whatB.th at C. howD.as
用来表达在 as… as中使用形容词/副词的原始级别，如 as long as：长达； as far as：远达； as much as：多达； as tall as：高达…例如：
That day they walked as far as ten kilometers in two hours.
考例：(2005安徽)John is the tallest boy in the class，_______according to himself.
A.five foot eight as tall as B.as tall as five foot eight C.as five foot eight tall as D.as tall five foot eight as
1.I watched her as she combed her hair.
2.As he grew older ，he lost interest in everything except gardening.
考例：1.(NMET1994)Mother was worried because little Alice was ill，especially____Father was away in France.
A. asB.th at C. during D. if火龙果智能语法检测
(b)答案是 A.“在…时”，等于 when.而 C选项是没有连接句子的介词。
2.(MET90)_____the day went on，the weather got worse.
A. With B. Since C. While D. As
(一)答案是 D.“随着”，而 as the day went on可以作为固定结构被记忆。
一. They were all dressed as clowns.他们都穿得像个丑角。
考例：(2005广东)I feel that one of my main duties_____a teacher is to help the students to become better learners.
A. fo rB.byC.as D. with