小學(xué)四年級英語知識點(diǎn)總結(jié)
小學(xué)生四年級已經(jīng)接觸了簡單的英語語法,接下來學(xué)習(xí)啦小編為你整理了小學(xué)四年級英語知識點(diǎn)總結(jié),一起來看看吧。
小學(xué)四年級英語知識點(diǎn)總結(jié):不規(guī)則變化
1) 元音字母發(fā)變化。
如man--men(男人) , woman--women(婦女)
tooth--teeth(牙齒) , foot--feet(腳)
mouse--mice(老鼠) , policeman--policemen(警察)
policewoman--policewomen(女警察)
2) 詞尾發(fā)生變化。
如child--children(小孩) , ox--oxen(公牛)
3) 單、復(fù)數(shù)形式相同。
如fish--fish(魚) ,sheep--sheep(綿羊) ,deer--deer(鹿) ,chinese--chinese(中國人) ,yuan--yuan(元) ,jinn--jinn(斤)
注意 不說an english,要說an englishman.
?、賔ish作魚肉講時(shí)不可數(shù),沒有復(fù)數(shù)。
?、趂ishes指各種不同種類魚或指幾條魚。
4) 形似單數(shù),實(shí)為復(fù)數(shù)意義。
如people(人,人們)these people
(不說a people,可說a person)
police(公安,警察)ten police
(不說a police,可說a policeman)
5) 由man和woman構(gòu)成的合成名詞,變復(fù)數(shù)將名詞及man或woman都變成復(fù)數(shù)。
如a man driver-men drivers(男司機(jī))
a woman doctor-women doctors (女醫(yī)生)
6) 合成名詞變?yōu)閺?fù)數(shù)時(shí),通常只將里面所含的主體名詞變?yōu)閺?fù)數(shù)。
如passer-by-passers-by(過路人)
bus driver-bus drivers(汽車司機(jī))
注意如果沒有主體名詞,就在最后一詞上加-s。如:
grown-up-grown-ups(成年人)
letter-box-letter-boxes (信箱)
注意①hair和fruit通常作單數(shù),表示總體。若表示若干根頭發(fā)或若干種水果,則需用這兩個(gè)詞的復(fù)數(shù)形式。
如would you like some more fruit? 你要不要再吃點(diǎn)水果?
we bought a lot of fruit from the market. 我們從市場上買了許多水果,
china has some good frits. 中國有一些好的水果。(指種類)
she has a few white hairs. 她有幾要白頭發(fā)。
his black hair is going white. 他的黑發(fā)逐漸變成灰白色。
注意②wind ,snow和rain這類詞,有時(shí)也可以有復(fù)數(shù)形式,表示多次的風(fēng)、雪或雨。
注意以boy 和girl開頭的復(fù)合名詞變成復(fù)數(shù)時(shí),一般只把后一名詞變成復(fù)數(shù)。
如 boy student-boy students(男學(xué)生)
girlfriend--girlfriends(女朋友)
7) 有些名詞只有作復(fù)數(shù)。
如scissors(剪刀)a pair of scissors(一把剪刀)trousers(褲子)shorts(短褲)jeans(工裝褲)compasses(兩腳規(guī))scales(天平)sunglasses(太陽鏡)surroundings(環(huán)境)savings(儲蓄)writings(作品)
名詞+man(woman)構(gòu)成的復(fù)合名詞,其復(fù)數(shù)形式通常與簡單名詞一樣,即把man(woman)改成men(women)。
如englishman--englishmen(英國人)
frenchwoman--frenchwomen(法國婦女)
注意german不是復(fù)合詞,它的復(fù)數(shù)是germans。
小學(xué)四年級英語知識點(diǎn)總結(jié):介詞的用法
表示時(shí)間的(at 、on、in、at、before ,after、by、 until、through、from、since、within)
(1)at:用于表示時(shí)刻,時(shí)間的某一點(diǎn)。
at noon在午時(shí) at night在夜間 at present目前
(2)on:用于星期,某天,某一天的上午、下午、晚上(指具體的某一天時(shí),一律用) on sunday在星期天 on sunday morning 在星期天的上午
on march 8 在3月8日
(3)in:用于表示周、月、季節(jié)、年、泛指上午、下午、晚上。
in 1999 在1999年 in november 在11月份
in summer 在夏季 in the afternoon在下午
過……后(未來時(shí)間)
i think he will be back in an hour 。我想他一小時(shí)后就會(huì)回來。
i heard that she would be back in a month.我聽說她一個(gè)月后回來的。
(4)before:在……之前
wei hua got up before 7 o’clock this morning 。今天早晨,魏華在7點(diǎn)之前起床了。
(5)after:在……之后
after that ,no noe should ever kill a seagull 。 從那時(shí)起,任何人不得捕殺海鷗。
(6)by:在……前(時(shí)間),截止(到)……
by the time i arrived ,she had already gone 。
在我到達(dá)之前,她已經(jīng)走了。
(7)for:達(dá)……之久(表示過了多少時(shí)間),可以和一般現(xiàn)在時(shí),過去時(shí),將來時(shí)連用,但是經(jīng)常和完成時(shí)連用。
florence often worked for twenty-four hours without rest 。
弗洛淪斯常常工作24小時(shí)而不休息。
(8)during:在……期間
during the lifetime of one man ,north america and europe will more further apart by nearly two metres 。
在一個(gè)人的一生期間,北美洲和歐洲由于漂移,其間的距離將要增加差不多兩米。
(9)through:一直……(從開始到結(jié)束)
he ,who led the united states through these years ,was shot on april 14, 1865 ,at a theater in washington
領(lǐng)導(dǎo)美國度過了這些年代的他,于1865年4月14日在美國華盛頓一家戲院里被人槍殺。
(10)from:從……起(時(shí)間)
the worders were made to work from 7 in the morning to 7 in the evening 。工人們被迫從早7點(diǎn)工作到晚7點(diǎn)。
(11)since:自從……以來(表示從以前某時(shí)一直到現(xiàn)在仍在繼續(xù))
since that time ,my eyes had never been very good.從那時(shí)起,我的眼睛一直不是很好。
(12)within:不……超過的范圍
he will arrive within an hour 。他一小時(shí)內(nèi)就人到。
小學(xué)四年級英語知識點(diǎn)總結(jié):定冠詞的用法
一、定冠詞不與表示一類人或事物的復(fù)數(shù)名詞連用例如:
1. I like reading the books.(×)I like reading books.(√)
2. She likes the cats.(×)She likes cats.(√)
二、定冠詞不能用在某些習(xí)慣用語中的名詞前面例如:
1. I have lunch at the noon.(×)I have lunch at noon.(√)
2. We go to school by the bus.(×)We go to school by bus.(√)
三、定冠詞不能用在某些專用名詞和不可數(shù)名詞前面例如:
1. I like the China.(×)I like China.(√)
2. Would you like a cup of the water? (×)
Would you like a cup of water?(√)
四、定冠詞不能用在節(jié)日、日期、月份、季節(jié)前面例如:
1. Today is the Teachers' Day. (×)
Today is Teachers' Day.(√)
2. He was born in the May in 1987. (×)
He was born in May in 1987. (√)
五、定冠詞不能用在表示稱呼語或某些頭銜的名詞前面(尤其作表語、賓補(bǔ)時(shí))例如:
1. Good morning, the sir!(×)
Good morning, sir! (√)
2. I need some help, the Mummy.(×)
I need some help, Mummy.(√)
六、定冠詞不能與名詞前已有作定語用的this, that, my, your, some, any等代詞連用例如:
1. This the pen is mine. (×)
This pen is mine.(√)
2. I have the some money. (×)
I have some money. (√)
七、定冠詞不能用在表示科目名詞的前面例如:
1. We will learn the Chinese, the history and the Maths this afternoon. (×)
We will learn Chinese, history and Maths this afternoon.(√)
2. The English is the most interesting of all the subjects.(×)
English is the most interesting of all the subjects.(√)
八、定冠詞不能用在三餐和球類運(yùn)動(dòng)名詞的前面例如:
1. She goes to school after the breakfast every morning.(×)
She goes to school after breakfast every morning.(√)
2. We often play the football after school. (×)
We often play football after school. (√)
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