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.
這幾個句子都涉及到了as的用法。作介詞用,第一句話中as用作關(guān)系代詞,引導(dǎo)定語從句,含義為“正如”,第二句話中as的含義為“作為,當(dāng)作”,做介詞。
下面讓我們結(jié)合歷年高考試題對其用法進(jìn)行分析。
一.用作連詞引導(dǎo)讓步狀語從句
從句必須用倒裝語序,把作表語用的名詞(不加冠詞)或作表語的形容詞,或動詞(原形),或副詞提到as前面。如:
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重慶)___,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
【解析】答案是B。作表語的是名詞student,名詞前不加冠詞。
2.(2005.廣東)____,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引導(dǎo)讓步狀語,將動詞原形try提到as前面。
二.用作關(guān)系代詞,引導(dǎo)定語從句
as用作關(guān)系代詞,引導(dǎo)定語從句,含義為“正如”。如:
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.
A.When B.After C.As D.Since
【解析】答案是C。意思是“正如我在電話里解釋的那樣……”。
2.(2006)The Beatles,____many of you are old enough to remember,came from Liverpool.
A.what B.that C.how D.as
【解析】答案是D。引導(dǎo)非限制性定語從句。
三.作為副詞
用于表示“和……一樣,”的意思,as…as中間要用形容詞/副詞的原級,如as long as:長達(dá);as far as遠(yuǎn)達(dá);as much as:多達(dá);as tall as含義為“高達(dá)…”。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
【解析】選B.as…as中間要用形容詞/副詞的原級。
四.引導(dǎo)時間狀語從句
含義為“當(dāng)…的時候”,如:
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.as B.that C.during D.if
【解析】答案是A.“在……時候”,相當(dāng)于when.而C選項是介詞,不接句子。
2.(MET90)_____the day went on,the weather got worse.
A.With B.Since C.While D.As
【解析】答案是D.“隨著”的意思,as the day went on可以作為固定結(jié)構(gòu)記住。
五.作介詞用
有“作為,當(dāng)作”的意思。如:
1.They were all dressed as clowns.他們都打扮得如小丑。
考例:(2005廣東)I feel that one of my main duties_____a teacher is to help the students to become better learners.
A.for B.by C.as D.with
【解析】選C。“作為教師”的意思。
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