高一英语第二十单元 Mainly Revision

5. throw away丢掉；浪费掉

After you printed the book , you had to throw away the carved pieces of wood .

The fish goes bad . Do throw it away .

6. use … for把……用作

We use brooms for sweeping floors .

What do you often use for sharpening your pencils ?

7. keep records of保存……的记录；把……记录下来

Wh

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at did people use for keeping records in the past ?

Better keep a record of what you spend .

8. in (other) parts of在……（其它）地区

Rice is grown in many parts of China .

Such kind of fruit can be found in the southern part of this country .

However , in other parts of the world , much of the history over hundreds of years is completely unknown .

9. over hundreds of years在几百年间，数百年来

10. tie … together把……捆在一起。tie … to … 把……系在……。

11. for use作为之用

It is too valuable for everyday use . 这东西作为日常之用太贵重了。

12. again and again = over and over again , time and again 一再；再三

13. beat …flat把……打平

The fibres joined together and were beaten flat . 那些纤维绞在一起，被打平。

14. in a sheet成薄纸状

The fibres were dried in a sheet . 那些纤维经干燥后而成薄纸。

15. after a time过了一段时间

16. as early as早在……

Colour printing was also invented by the Chinese as early as the 10th century .

17. hold a competition举行比赛

18. win a prize获奖

Who won the first prize in the 100-meter race ?

19. with the development of随着……的发展

With the development of science , people will be able to find out more secrets of the universe .

20. put to use加以利用

We should put weekends to good use . 我们应该好好利用周末。

He puts his holidays to good use and gives a helping hand to the old .

21. do good to sb = do sb good 对某人有好处

What good can it do to us ?

Doing morning exercises will do good to you .

22. take / have lessons听课，学习

On Sunday , we can take lessons in foreign languages and computer science .

单元难点疑点思路明晰

1 . The Chinese have been making paper for two thousand years . 中国人造纸已经有两千年的历史了。

句中谓语 have been making 是现在完成进行时态，即由“have/has been + 现在分词”构成。这种时态主要表示在以前这一段时间里一直在进行的动作，该动作可能仍在进行，也可能刚停止。该句用现在完成进行时表示“中国人在两千年前已开始造纸，‘造纸’这一动作一直延续至今，而且将继续进行下去。”这种时态和现在完成时的区别主要在于它强调动作在某一段时间一直在进行，该动作通常有现在的结果。例如：

Father has been working in this car factory for ten years . ( 指他现在仍在这家汽车厂工作，而且将继续在这里工作。 )

Father has worked in this car factory for ten years . ( 指他至今为止在这家汽车厂工作了十年，至于今后是否还在这里继续工作，要视具体情况来定。 )

2 . As there was no paper in these countries , no records were kept . 由于这些国家没有纸，因此，也就没有史料记载。

( 1 ) as 在此作连词，意为“因为；既然”，引导原因状语从句，常置于句首

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，主要表示明显或以为明显的原因。例如：

As it\'s sunny , I\'ll go for a walk .

As she didn\'t come , we left without her .

( 2 ) no 当形容词作定语时，相当于 not a , not one 或 not any , 可修饰复数名词，也可修饰单数名词。no 修饰的名词作主语时，谓语动词的单复数形式视 no 后面的名词的单复数形式而定。例如：

There\'s no telephone in our house .

There\'s no buses in this part of town .

3 . Although these were much more useful than the metal pots , they were still difficult to read and were very heavy to carry . 虽然这些比钟鼎文有用得多，但是读起来还很费劲，拿起来也很重。

( 1 ) much more useful than…中的 much 为副词，修饰比较级，表示程度。类似的还有 a lot , a little , far , even , still 等。

It\'s much/far/a lot colder today than yesterday .

Now it\'s raining even/still harder than before .

( 2 ) difficult to read 和 heavy to carry 都属于“形容词 + 不定式”结构，不定式在形容词后面作状语。在此结构中，不定式用主动表式表示被动含义，它和句子的主语构成逻辑上的动宾搭配关系，能够用于此结构的动词主要有 easy , hard , difficult , light , cheap , important , interesting 以及它们的反义词等。例如：

The old man is hard to get along with .

These novels are very interesting to read .

4 . This kind of paper was as soft and light as silk but much less expensive . 这种纸和丝帛一样轻柔，不过便宜得多。

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