人教版高中英语必修2Unit5知识点详解(4)

Some people waste food while others haven't enough. 有些人很费粮食，然而有些人却吃不饱。

(2)while 用作从属连词，引导时间状语从句，意为“当 的时候；和 同时”，此时的主从句谓语动作同时发生，从句谓语通常是延续性动词。

While she was listening to the radio，she fell asleep. 她听着收音机睡着了。

(3)while 引导从句时，如果主从句的主语一致，且从句谓语又含有 be, 则从句主语和 be 可以省略。 while 后可直接跟现在分词、名词、形容词或介词短语。

(4)while 引导让步状语从句，常放在句首，意为“尽管”，比 although 或 though 语气轻。 While he loves his students，he is very strict with them..虽然他爱他的学生，可是他对他们很严

格。

(5)while 引导条件状语从句，意为“只要”，其意思和用法相当于 as long as。while 可位于句首，也可位于句中。

While there is life there is hope.只要生命存在，就有希望。

【易错提示】

while 引导时间状语从句时，后跟延续性动词；when 引导时间状语从句时，可以跟延续性动词，也可以跟短暂性动词。例如：

①When/While I was in junior middle school, I liked English very much.我上初中时非常喜欢英语。

②When he entered, I was watching TV.当他进来时我正在看电视(不能用while)。

即境活用16 Tom likes playing chess ________ his sister enjoys playing the piano.

A．until B．before C．while D．after

[解析]while 用于前后两者的对比转折，意为“然而”。[答案]C

高考真题链接

1.（2010·江西卷·T25）Parents _______ much importance to education. They will do their best to give their children that priceless gift.

A attach B pay C link D apply

【解析】选A。考察动词词组。attach importance to 关注.

2.（2010·辽宁卷·T32）The new movie _____to be one of the biggest money-makers of all time .

A. promises B. agrees c. pretends D. declines

【解析】选A。这部新电影有望成为电影票房史上票房最高的影片之一。

考查动词意义辨析。promise除了表示“允诺，答应”外，还有“有 的希望”的意思；agree是“同意，赞同”；pretend是“假装”；decline是“衰老，衰退”。只有promises符合题意。

3.（2009·安徽卷·T27）.A good friend of mine from I was born showed up at my home right before I left for Beijing.

A. how B. whom C. when D. which

【解析】选C。本题对学生来说较难,不容易看的懂.本句意为”就在我准备去北京前,我儿时的一位好朋友到我家里来了.”

4.（2009·湖南卷·T26）I was born in New Orleans, Louisiana, a city name will create a picture of beautiful trees and green grass in our mind.

A. which B. of which C. that D. whose

【解析】选D。考查定语从句。先行词在定语从句中充当定语，意思为这个城市的名字。

5.（2009·江苏卷·T24.）.

----So am I. They seemed very happy together when I last saw them.

A. broken up B. finished up C. divided up D closed up

【解析】选A动词短语辨析break up 断绝关系。 finish up 结果成为；最终到来。 divide up 分担，分配，分享。close up （伤口）愈合。

6.（09四川，8） —How about your journey to Mount Emei?

—Everything was wonderful except that our car _________ twice on the way.

A. slowed down B. broke down C. got down D. put down

【解析】B。考查动词短语的区别，答语的意思是：一切都进展顺利除了我们的汽车在途中抛锚了两次外。break down抛锚；slow down 慢下来；get down记下，写下；put down 扑

灭。所以该题的答案为B.

7. （2009·江西·T26） The house I grew up ________ has been taken down and replaced by an office building.

A. in it B. in C. in that D. in which

【解析】选B 本题考查定语从句。The house ( which / that I grew up in ) , 主语后面紧跟的是定语从句。

8.（2009·陕西卷·T11）Gun control is a subject Americans have argued for a long time.

A. of which B. with which C. about which D. into which

【解析】选C考查定语从句，先行词是Gun control，指物，关系词在从句中做介词的宾语，介词前置，介词与从句动词构成搭配argue about sth，选C。

9.（2009·陕西卷·T13）My parents don’t mind what job I do I am happy.

A. even though B. as soon as C. as long as D. as though

【解析】选C。考查状语从句。根据题干意思可知此处是条件状语从句，引导词意思是：只要，选C。even though引导让步状语从句，意思是：即使；as soon as引导时间状语从句，意思是：一……就……；as though引导方式状语从句，意思是：仿佛，好象。

课后练习：

词汇拓展

1. music n. 音乐 ________音乐家 n. ________音乐的 adj.

2. honest adj. 诚实的________坦诚地 adv.________诚实，坦率 n.

3. loosely adv.松散地________松散的 adj. ________紧的，牢固的 adj.

________紧地，牢固地 adv.

4. advertisement n广告 _______登广告 vt.

5. actor n.（男）演员______ 扮演 vt.______ 女演员 n.______ 行动 n.______ 活动n.

6. attractive 吸引人的，有吸引力的 adj. _______吸引 vt._______吸引力n

7. perform表演，履行，执行 vt.&vi. ________表演，履行 n.

8. stick坚持，粘贴，张贴 vt&vi_______过去式 ________过去分词

9. ability 能力 n _______有能力的adj.______使能够 vt. _______使无能 vt.

_______残疾的 adj. _______无能，残疾n.

10. unknown不知道的，不知名的adj._______已知的，知名的 adj.

词语派生 用括号中所给词的适当形式填空。

1. As is known to all that Li Guyi is a famous __________ (sing) .

2. John’s ______________ (perform) in the exam was really disappointing.

3. She had a ___________ (music) voice when she was young，.

4. Kitchen utensils(用具) should be __________ (attract) as well as functional.

5. We need more ___________ (act) and less talk.

singer performance musical attractive action

6. These creatures have the __________ (able) to withstand（忍受）very low temperature.

7. A lack of ___________ (confident) seems to be her main problem.

8. Just tie it ____________ (loose).

9. We all felt ____________ (excite) when we heard the good news that our basketball team had won the match..