人教版高一英語(yǔ)下冊(cè)第四單元知識(shí)點(diǎn)
人教版高一英語(yǔ)下冊(cè)第四單元知識(shí)點(diǎn)
由于高中階段要學(xué)習(xí)的英語(yǔ)知識(shí)點(diǎn)比較多,所以從高一開始我們就要注重英語(yǔ)每個(gè)單元的知識(shí)點(diǎn)復(fù)習(xí)和積累。以下是小編給你推薦的高一英語(yǔ)下冊(cè)第四單元知識(shí)點(diǎn),希望對(duì)你有幫助!
英語(yǔ)第四單元知識(shí)點(diǎn)
1. In the 18th century, Benjamin Franklin cinducted a number of experiments in which he showed what electricity is.在18世紀(jì),本杰明富蘭克林進(jìn)行了許多次關(guān)于電的實(shí)驗(yàn)。
[問(wèn)]...in which he showed what electrivity is. in + which 引導(dǎo)定語(yǔ)從句,修飾先行詞experiments。 這里which不能由that替換。
(2)...what electricity is 賓語(yǔ)從句,做show的賓語(yǔ)。
(3)A number of...“許多,大量”,接可數(shù)名詞復(fù)數(shù),謂語(yǔ)要用復(fù)數(shù)形式;the number of...“……的數(shù)量”謂語(yǔ)動(dòng)詞應(yīng)該用單數(shù)。
例如:A number of peasants are working inthe fields with the sun burning in the shy. 許多農(nóng)民頂著烈日在地里耕作。
2. Having realized that I could use a kite to aftract lightning. I decided to do an experiment. 當(dāng)我意思到能用風(fēng)箏來(lái)接收閃電后,我決定做個(gè)實(shí)驗(yàn)。
[問(wèn)]Having realized that ... 在句子充當(dāng)什么成分?
[答]Having realized that ... 現(xiàn)在分詞短語(yǔ)做時(shí)間狀語(yǔ)。(=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. 大多數(shù)風(fēng)箏是由紙做的,但用絲綢制的風(fēng)箏在雨和大風(fēng)的天氣中持續(xù)的時(shí)間會(huì)長(zhǎng)一些。
[問(wèn)]made of silk 在句中作何成分?be made of 與be made from 有何區(qū)別?
[答] made of silk 過(guò)去粉刺短語(yǔ)所定語(yǔ),修飾a kite, he made of...由……構(gòu)成(看得出原材料);be made from 由……構(gòu)成(看不出原材料)。
4. The pieces should be just long enough to reach the comers of the handkerchief.那木頭片的長(zhǎng)度應(yīng)該達(dá)到手帕的四個(gè)角。
[問(wèn)]enough在句中如何用?reach是什么意思?
[答](1)enough to ..." 足夠……的”, enough修飾形容詞時(shí)應(yīng)放在形容詞之后。例如:kind enough 足夠善良的;careful enough足夠仔細(xì)的。
(2)reach v. & n. 達(dá)到;夠得著。例如:out of reach夠不著。
5. Add a tail to the frame and tie a long string to the cross so you can control the kite.在架子上加一個(gè)把柄,在十字架上栓一根長(zhǎng)細(xì)繩以便你能夠控制那風(fēng)箏。
[問(wèn)]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 .請(qǐng)?jiān)谶@個(gè)句子中加上一個(gè)定冠詞,然后它就對(duì)了。
6. THis ribbon, which must not get wet, will protect you from the electricity.這根絲帶一定不能變濕,它是用來(lái)保護(hù)你不被觸電的。
[問(wèn)]which must not get wet 作何成分, protect...from...是什么意思?
[答](1)...which must not get wet ,非限制性定語(yǔ)從句做定語(yǔ),修飾This ribbon.
(2)protect ... from... “保護(hù)……免受……”,相當(dāng)于prevent ... from ...;stop ...from...;keep ...from。
例如:We should prevent our environment from being polluted. 我們應(yīng)該保護(hù)我們的環(huán)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,動(dòng)物們被用來(lái)測(cè)試如洗發(fā)水,皮膚霜以及新的治癌藥等產(chǎn)品。
[問(wèn)]be used to do ..., be used to doing ... 和used to do 有何區(qū)別?
[答]be used to do ... 被用來(lái)做什么......
be used to doing ... 習(xí)慣于做……
used to do ...過(guò)去常常做……
8. They also believe that it is possible to use much fewer animals.
他們還相信用更少的動(dòng)物測(cè)試是可能的。
[問(wèn)]it is possible to do ...做……是可能的;
It is + adj. +to do ... it 是形式主語(yǔ),真正的主語(yǔ)是動(dòng)詞不定式短語(yǔ)to do...
例如:It is difficult to learn two foreigh languages. 學(xué)會(huì)兩門外語(yǔ)是困難的。
It is impossible to walk on the moon. 在月球上行走是不可能的。
英語(yǔ)第四單元練習(xí)題
1、 帶把傘可防曬。
Taking an umbrella will ________ _______ ________ ______ -______.
2、 毫無(wú)疑問(wèn),他在說(shuō)謊。
______ _______ ______ _______ that he is lying.
3、 意識(shí)到他一個(gè)人干不了這件事,他向我求助。
_______ ________ that he couldn’t do it himself, he asked me for help.
4、 那位老師對(duì)全班的學(xué)生進(jìn)行了數(shù)學(xué)測(cè)試。
The teacher ________ the whole class ______ maths.
5、 請(qǐng)你幫我選出一本雜志好嗎?
Will you ________ _______ a magazine for me?
6、 我們可以在大廳拍照嗎?
______ ______ ________ ______ take pictures in the hall?
7、 請(qǐng)?jiān)诳Х戎屑狱c(diǎn)糖。
Please ______ some sugar ____ the coffee.
8、 媽媽開始做家務(wù)。
Mother is _________ ______ ______ her housework.
9、 什么也阻止不了我們到這里來(lái)。
Nothing will __________ us _______ ________ here.
10、 他沒(méi)有勇氣違背他父親的意愿。
He has no courage ______ ______ _______ his father’s will.
11、 穿上這件外套。它可以御寒。
Put on this coat. It will _______ you ________ the cold.
12、 這些酒瓶是用玻璃制造的。
These wine bottles __________ glass.
13、 這種酒是用葡萄釀造的。
This kind of wine __________ grapes.
14、 注意在實(shí)驗(yàn)開始之前把一切都準(zhǔn)備好。
________ _______ that everything is prepared before the experiment begins.
15、 每個(gè)隊(duì)都有兩次得分,比賽不分勝負(fù)。
Each team scored twice and the game_______ ______ ______ _______.
16、 為什么學(xué)生在聞從瓶子里冒出來(lái)的氣味時(shí)要小心?
Why should students _______ _______ ________ from bottle?
17、 如果你眼睛里進(jìn)了東西,該怎么辦?
What ______ _____ ______ ______ when something gets into your eyes?
18、 它實(shí)在太昂貴了。
It is ______ ______ expensive.
19、 它既快又干凈,而且不產(chǎn)生噪音,就像飛機(jī)一樣。
It’s fast and clean and it does not make any noise, _____ ______ ____.
20、 那對(duì)經(jīng)濟(jì)(發(fā)展)有好處。
It ______ ________ ________ the economy.
21、 你使用的幾乎每一種藥都曾在動(dòng)物身上試驗(yàn)過(guò)。
Almost every medicine you use ______ ______ ________ _______ animals.
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