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小学四年级英语知识点总结

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小学生四年级已经接触了简单的英语语法,接下来本站小编为你整理了小学四年级英语知识点总结,一起来看看吧。

小学四年级英语知识点总结
  小学四年级英语知识点总结:不规则变化

1) 元音字母发变化。

如man--men(男人) , woman--women(妇女)

tooth--teeth(牙齿) , foot--feet(脚)

mouse--mice(老鼠) , policeman--policemen(警察)

policewoman--policewomen(女警察)

2) 词尾发生变化。

如child--children(小孩) , ox--oxen(公牛)

3) 单、复数形式相同。

如fish--fish(鱼) ,sheep--sheep(绵羊) ,deer--deer(鹿) ,chinese--chinese(中国人) ,yuan--yuan(元) ,jinn--jinn(斤)

注意 不说an english,要说an englishman.

①fish作鱼肉讲时不可数,没有复数。

②fishes指各种不同种类鱼或指几条鱼。

4) 形似单数,实为复数意义。

如people(人,人们)these people

(不说a people,可说a person)

police(公安,警察)ten police

(不说a police,可说a policeman)

5) 由man和woman构成的合成名词,变复数将名词及man或woman都变成复数。

如a man driver-men drivers(男司机)

a woman doctor-women doctors (女医生)

6) 合成名词变为复数时,通常只将里面所含的主体名词变为复数。

如passer-by-passers-by(过路人)

bus driver-bus drivers(汽车司机)

注意如果没有主体名词,就在最后一词上加-s。如:

grown-up-grown-ups(成年人)

letter-box-letter-boxes (信箱)

注意①hair和fruit通常作单数,表示总体。若表示若干根头发或若干种水果,则需用这两个词的复数形式。

如would you like some more fruit? 你要不要再吃点水果?

we bought a lot of fruit from the market. 我们从市场上买了许多水果,

china has some good frits. 中国有一些好的水果。(指种类)

she has a few white hairs. 她有几要白头发。

his black hair is going white. 他的黑发逐渐变成灰白色。

注意②wind ,snow和rain这类词,有时也可以有复数形式,表示多次的风、雪或雨。

注意以boy 和girl开头的复合名词变成复数时,一般只把后一名词变成复数。

如 boy student-boy students(男学生)

girlfriend--girlfriends(女朋友)

7) 有些名词只有作复数。

如scissors(剪刀)a pair of scissors(一把剪刀)trousers(裤子)shorts(短裤)jeans(工装裤)compasses(两脚规)scales(天平)sunglasses(太阳镜)surroundings(环境)savings(储蓄)writings(作品)

名词+man(woman)构成的复合名词,其复数形式通常与简单名词一样,即把man(woman)改成men(women)。

如englishman--englishmen(英国人)

frenchwoman--frenchwomen(法国妇女)

注意german不是复合词,它的复数是germans。

  小学四年级英语知识点总结:介词的用法

表示时间的(at 、on、in、at、before ,after、by、 until、through、from、since、within)

(1)at:用于表示时刻,时间的某一点。

at noon在午时 at night在夜间 at present目前

(2)on:用于星期,某天,某一天的上午、下午、晚上(指具体的某一天时,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、季节、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

过……后(未来时间)

i think he will be back in an hour 。我想他一小时后就会回来。

i heard that she would be back in a month.我听说她一个月后回来的。

(4)before:在……之前

wei hua got up before 7 o’clock this morning 。今天早晨,魏华在7点之前起床了。

(5)after:在……之后

after that ,no noe should ever kill a seagull 。 从那时起,任何人不得捕杀海鸥。

(6)by:在……前(时间),截止(到)……

by the time i arrived ,she had already gone 。

在我到达之前,她已经走了。

(7)for:达……之久(表示过了多少时间),可以和一般现在时,过去时,将来时连用,但是经常和完成时连用。

florence often worked for twenty-four hours without rest 。

弗洛沦斯常常工作24小时而不休息。

(8)during:在……期间

during the lifetime of one man ,north america and europe will more further apart by nearly two metres 。

在一个人的一生期间,北美洲和欧洲由于漂移,其间的距离将要增加差不多两米。

(9)through:一直……(从开始到结束)

he ,who led the united states through these years ,was shot on april 14, 1865 ,at a theater in washington

领导美国度过了这些年代的他,于1865年4月14日在美国华盛顿一家戏院里被人枪杀。

(10)from:从……起(时间)

the worders were made to work from 7 in the morning to 7 in the evening 。工人们被迫从早7点工作到晚7点。

(11)since:自从……以来(表示从以前某时一直到现在仍在继续)

since that time ,my eyes had never been very good.从那时起,我的眼睛一直不是很好。

(12)within:不……超过的范围

he will arrive within an hour 。他一小时内就人到。

  小学四年级英语知识点总结:定冠词的用法

一、定冠词不与表示一类人或事物的复数名词连用例如:

1. I like reading the books.(×)I like reading books.(√)

2. She likes the cats.(×)She likes cats.(√)

二、定冠词不能用在某些习惯用语中的名词前面例如:

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、定冠词不能用在某些专用名词和不可数名词前面例如:

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、定冠词不能用在节日、日期、月份、季节前面例如:

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、定冠词不能用在表示称呼语或某些头衔的名词前面(尤其作表语、宾补时)例如:

1. Good morning, the sir!(×)

Good morning, sir! (√)

2. I need some help, the Mummy.(×)

I need some help, Mummy.(√)

六、定冠词不能与名词前已有作定语用的this, that, my, your, some, any等代词连用例如:

1. This the pen is mine. (×)

This pen is mine.(√)

2. I have the some money. (×)

I have some money. (√)

七、定冠词不能用在表示科目名词的前面例如:

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、定冠词不能用在三餐和球类运动名词的前面例如:

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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