高一英语下册第四单元重点解析:Scientists at work(人教版)

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高一英语下册第四单元重点解析:Scientists at work(人教版)

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莲山 课件 w ww.5 Y
K J.CO
M

高一英语下册第四单元重点解析:Scientists at work(人教版)

【Scientists at work知识点】

疑难详解

1. In the 18th century, Benjamin Franklin cinducted a number of experiments in which he showed what electricity is.在18世纪,本杰明富兰克林进行了许多次关于电的实验。

[问]...in which he showed what electrivity is. in + which 引导定语从句,修饰先行词experiments。 这里which不能由that替换。

(2)...what electricity is 宾语从句,做show的宾语。

(3)A number of...“许多,大量”,接可数名词复数,谓语要用复数形式;the number of...“……的数量”谓语动词应该用单数。

例如:A number of peasants are working inthe fields with the sun burning in the shy. 许多农民顶着烈日在地里耕作。

2. Having realized that I could use a kite to aftract lightning. I decided to do an experiment. 当我意思到能用风筝来接收闪电后,我决定做个实验。

[问]Having realized that ... 在句子充当什么成分?

[答]Having realized that ... 现在分词短语做时间状语。(=when I had realized that I could use a kite to attract lightning, ...)

3. Most kites are made of paper, but a kite made of silk will last longer in weather with rain and strong winds. 大多数风筝是由纸做的,但用丝绸制的风筝在雨和大风的天气中持续的时间会长一些。

[问]made of silk 在句中作何成分?be made of 与be made from 有何区别?

[答] made of silk 过去粉刺短语所定语,修饰a kite, he made of...由……构成(看得出原材料);be made from 由……构成(看不出原材料)。

4. The pieces should be just long enough to reach the comers of the handkerchief.那木头片的长度应该达到手帕的四个角。

[问]enough在句中如何用?reach是什么意思?

[答](1)enough to ..." 足够……的”, enough修饰形容词时应放在形容词之后。例如:kind enough 足够善良的;careful enough足够仔细的。

(2)reach v. & n. 达到;够得着。例如:out of reach够不着。

5. Add a tail to the frame and tie a long string to the cross so you can control the kite.在架子上加一个把柄,在十字架上栓一根长细绳以便你能够控制那风筝。

[问]add...to...是什么意思?

[答]add...to...把……加到……。

例如:Please add an article to the sentence, then it is correct now .请在这个句子中加上一个定冠词,然后它就对了。

6. THis ribbon, which must not get wet, will protect you from the electricity.这根丝带一定不能变湿,它是用来保护你不被触电的。

[问]which must not get wet 作何成分, protect...from...是什么意思?

[答](1)...which must not get wet ,非限制性定语从句做定语,修饰This ribbon.

(2)protect ... from... “保护……免受……”,相当于prevent ... from ...;stop ...from...;keep ...from。

例如:We should prevent our environment from being polluted. 我们应该保护我们的环境免受污染。

7. Around the world, animals are used to test produce such as shampoo, skin creams and new cancer drugs. 在全世界,动物们被用来测试如洗发水,皮肤霜以及新的治癌药等产品。

[问]be used to do ..., be used to doing ... 和used to do 有何区别?

[答]be used to do ... 被用来做什么......

be used to doing ... 习惯于做……

used to do ...过去常常做……

8. They also believe that it is possible to use much fewer animals.

他们还相信用更少的动物测试是可能的。

[问]it is possible to do ...做……是可能的;

It is + adj. +to do ... it 是形式主语,真正的主语是动词不定式短语to do...

例如:It is difficult to learn two foreigh languages. 学会两门外语是困难的。

It is impossible to walk on the moon. 在月球上行走是不可能的。

疑难详解

1. In the 18th century, Benjamin Franklin cinducted a number of experiments in which he showed what electricity is.在18世纪,本杰明富兰克林进行了许多次关于电的实验。

[问]...in which he showed what electrivity is. in + which 引导定语从句,修饰先行词experiments。 这里which不能由that替换。

(2)...what electricity is 宾语从句,做show的宾语。

(3)A number of...“许多,大量”,接可数名词复数,谓语要用复数形式;the number of...“……的数量”谓语动词应该用单数。

例如:A number of peasants are working inthe fields with the sun burning in the shy. 许多农民顶着烈日在地里耕作。

2. Having realized that I could use a kite to aftract lightning. I decided to do an experiment. 当我意思到能用风筝来接收闪电后,我决定做个实验。

[问]Having realized that ... 在句子充当什么成分?

[答]Having realized that ... 现在分词短语做时间状语。(=when I had realized that I could use a kite to attract lightning, ...)

3. Most kites are made of paper, but a kite made of silk will last longer in weather with rain and strong winds. 大多数风筝是由纸做的,但用丝绸制的风筝在雨和大风的天气中持续的时间会长一些。

[问]made of silk 在句中作何成分?be made of 与be made from 有何区别?

[答] made of silk 过去粉刺短语所定语,修饰a kite, he made of...由……构成(看得出原材料);be made from 由……构成(看不出原材料)。

4. The pieces should be just long enough to reach the comers of the handkerchief.那木头片的长度应该达到手帕的四个角。

[问]enough在句中如何用?reach是什么意思?

[答](1)enough to ..." 足够……的”, enough修饰形容词时应放在形容词之后。例如:kind enough 足够善良的;careful enough足够仔细的。

(2)reach v. & n. 达到;够得着。例如:out of reach够不着。

5. Add a tail to the frame and tie a long string to the cross so you can control the kite.在架子上加一个把柄,在十字架上栓一根长细绳以便你能够控制那风筝。

[问]add...to...是什么意思?

[答]add...to...把……加到……。

例如:Please add an article to the sentence, then it is correct now .请在这个句子中加上一个定冠词,然后它就对了。

6. THis ribbon, which must not get wet, will protect you from the electricity.这根丝带一定不能变湿,它是用来保护你不被触电的。

[问]which must not get wet 作何成分, protect...from...是什么意思?

[答](1)...which must not get wet ,非限制性定语从句做定语,修饰This ribbon.

(2)protect ... from... “保护……免受……”,相当于prevent ... from ...;stop ...from...;keep ...from。

例如:We should prevent our environment from being polluted. 我们应该保护我们的环境免受污染。

7. Around the world, animals are used to test produce such as shampoo, skin creams and new cancer drugs. 在全世界,动物们被用来测试如洗发水,皮肤霜以及新的治癌药等产品。

[问]be used to do ..., be used to doing ... 和used to do 有何区别?

[答]be used to do ... 被用来做什么......

be used to doing ... 习惯于做……

used to do ...过去常常做……

8. They also believe that it is possible to use much fewer animals.

他们还相信用更少的动物测试是可能的。

[问]it is possible to do ...做……是可能的;

It is + adj. +to do ... it 是形式主语,真正的主语是动词不定式短语to do...

例如:It is difficult to learn two foreigh languages. 学会两门外语是困难的。

It is impossible to walk on the moon. 在月球上行走是不可能的。

文章来源
莲山 课件 w ww.5 Y
K J.CO
M
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