小学英语基础知识

英语基础知识,整理的太全了! 第一部分:基础知识 1.字母:26个字母的大小写 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h I j k l m n o p q r s t u v w x y z 2.语音:元音的发音 五个元音字母:A E I O U 12个音: 前元音:[i:] [?] /e/ [?]中元音:[?:] [?] 后元音:[ɑ:] [?] [?:] [u :] [?] [?] 双元音(8个) 合口双元音(5个)[ai] [ei] [au] [?u] [?i] 集中双元音(3个) [i?][ε?][u?] 3.词汇:词汇量,近反义词 4.句子:大小写,标点符号 第二部分:语法知识 1名词:名词单复数,名词的格 (一)名词单复数 一般情况,直接加-s,如:book-books, bag-bags, cat-cats, bed-beds 以s. x. sh. ch结尾,加-es,如:bus-buses, box-boxes, brush-brushes, watch-watches 以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families, strawberry-strawberries 以“f或fe”结尾,变f或fe为v, 再加-es,如:knife-knives 不规则名词复数: man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice child-children, foot-feet, tooth-teeth, fish-fish, people-people, Chinese-Chinese, Japanese-Japanese 不可数名词的复数就是原型: paper, juice, water, milk, rice, tea (二)名词的格 有生命的东西的名词所有格: a) 单数后加’s 如: Lucy’s ruler my father’s shirt b) 以s 结尾的复数名词后加’如: his friends’ bags c) 不以s 结尾的复数后加’s children’s shoes 并列名词中,如果把’s加在最后一个名词后,示共有, 如: Tom and Mike’s car 汤姆和迈克共有的小汽车 要表示所有物不是共有的,应分别在并列名词后加’s Tom’s and Mike’s cars 汤姆和麦克各自的小汽车 (2)表示无生命东西的名词通常用“ of +名词”来表示所有关系:如: a picture of the classroom a map of China 2冠词:不定冠词,定冠词种类: (1)不定冠词:a / an a unit / an uncle 元音开头的可数名词前用an : an egg / an apple / an orange / an eraser / an answer / an ID card / an alarm clock / an actor / an actress / an e-mail / an address / an event / an example / an opera / an houran old man / an interesting book / an exciting sport / an action movie / an art lesson / (2)定冠词:the the egg the plane 定冠词的用法: 特指某(些)人或某(些)物: The ruler is on the desk. 复述上文提到的人或物:He has a sweater. The sweater is new. 谈话双方都知道的人或物:The boys aren’t at school. 在序数词前: John’s birthday is February the second. 用于固定词组中: in the morning / afternoon / evening 不用冠词的情况: 专有名词前:China is a big country. 名词前有定语:this , that , my , your , some, any , no 等: This is my baseball. 复数名词表示一类人和事:Monkeys can’t swim. They are teachers. 在节日,日期,月份,季节前:Today is Christmas Day. It’s Sunday. 一日三餐前:We have breakfast at 6:30. 球类棋类运动前:They often play football after class. He plays chess at home. * 但乐器前要用定冠词:I play the guitar very well. 学科名称前:My favorite subject is music. 在称呼或头衔的名词前:This is Mr Li. 固定词组中:at noon at night by bus 3代词、形容词、副词 1.代词:人称代词,物主代词 人称代词物主代词 主格宾格 第一 人称单数I(我)memy(我的) 复数we(我们)usour(我们的) 第二 人称单数you(你)youyour(你的) 复数you(你们)youyour(你们的) 第三 人称单数he(他)himhis(他的) she(她)herher(她的) it(它)itits(它的) 复数they(他们/她们/它们)themtheir(他们的/她们的/它们的) 2.形容词,副词:比较级,最高级 (一)、形容词的比较级 1、形容词比较级在句子中的运用:两个事物或人的比较用比较级,比较级后面一般带有单词than。比较级前面可以用more, a little来修饰表示程度。than后的人称代词用主格(口语中可用宾格)。 2.形容词加er的规则: 一般在词尾加er ; 以字母e 结尾,加r ; 以一个元音字母和一个辅音字母结尾,应双写末尾的辅音字母,再加er ; 以“辅音字母+y”结尾,先把y变i,再加er 。 3.不规则形容词比较级: good-better, beautiful-more beautiful (二)副词的比较级 1.形容词与副词的区别(有be用形,有形用be;有动用副,有副用动) ⑴在句子中形容词一般处于名词之前或be动词之后 ⑵副词在句子中最常见的是处于实义动词之后 2.副词比较级的变化规则基本与形容词比较级相同(不规则变化: well-better, far-farther) 4数词:基数词、序数词 基数词: (1)1-20 one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve, thirteen,fourteen,fifteen, sixteen,seventeen,eighteen,nineteen, twenty (2)21-99 先说“几十”,再说“几”,中间加连字符。 23→twenty-three,34→thirty-four,45→forty—five,56→fifty-six,67→sixty-seven,78→seventy-eight,89→eighty-nine,91→ninety-one (3)101—999先说“几百”,再加and,再加末两位数或末位数; 586→five hundred and eighty-six, 803→eight hundred and three (4)l,000以上,先从右往左数,每三位数加一个“,”,第一个“,”前为thousand. 第二个“,”前为million,第三个“,”前为billion 1,001→one thousand and one 18,423→eighteen thousand,four hundred and twenty-three 6,260,309→six million two hundred and sixty thousand three hundred and nine 750,000,000,000→seven hundred and fifty billion 序数词 (1)一般在基数词后加th eg.four→fourth,thirteen→thirteenth (2)不规则变化 one→first,two→second,three→third,five→fifth,eight→eighth,nine →ninth,twelve—twelfth (3)以y结尾的十位整数,变y为ie再加th twenty→twentieth, forty→fortieth, ninety→ninetieth (4)从二十一后的“几十几”直至“几百几十几”或“几千几百几十几”只将个位的基数词变为序数词。 twenty-first,two hundred and forty-fifth 基数词转为序数词的口诀: 基变序,有规律,词尾加上-th. 一,二,三,特殊记,词尾字母t,d,d. 八去t,九去e, ve要用f替。 ty将y变成i,th前面有个e. 若是碰到几十几,前用基来后用序。 5介词:常用介词:in, on, at, behind等 1.at表示时间概念的某一个点。(在某时刻、时间、阶段等)。 at 1:00(dawn,midnight,noon)在一点钟(黎明、午夜、中午) 2.on 1)表示具体日期。 注:(1)关于"在周末"的几种表示法: at(on)the weekend---特指 at(on)weekends---泛指 over the weekend during the weekend (2)在圣诞节,应说at Christmas?而不说on Christmas? 2)在(刚……)的时候。 On reaching the city he called up his parents. 一到城里他就给父母打了一个电话。 3.in 1)表示"时段"、"时期",在多数情况下可以和during互换,前者强调对比,后者强调持续。 in(during)1988(December,the 20th century) 在一九八八年(十二月、二十世纪) 6动词:动词的四种时态: (1)一般现在时: 一般现在时的构成 1. be动词:主语+be(am, is, are)+其它。如: I am a boy. 我是一个男孩。 2. 行为动词:主语+行为动词(+其它)。如: We study English. 我们学习英语。 当主语为第三人称单数(he, she, it)时,要在动词后加"-s"或"-es"。如:Mary likes Chinese.玛丽喜欢汉语。 动词+s的变化规则 1.一般情况下,直接加-s,如:cook-cooks, milk-milks 2.以s. x. sh. ch. o结尾,加-es,如:guess-guesses, wash-washes, watch-watches, go-goes 3.以“辅音字母+y”结尾,变y为i, 再加-es,如:study-studies (2)一般过去时: 动词过去式详解动词的过去式的构成规则有: A、规则动词 ①一般直接在动词的后面加ed:如 worked , learned , cleaned , visited ②以e结尾的动词直接加d:如 lived , danced , used ③以辅音字母加y结尾的动词要改y为i再加ed(此类动词较少)如 study –studied carry – carried worry – worried (注意play、stay不是辅音字母加y,所以不属于此类) ④双写最后一个字母(此类动词较少)如 stopped B、不规则动词(此类词并无规则,须熟记) 小学阶段要记住以下动词的原形和过去式: sing – sang , eat – ate ,see – saw , have – had , do – did ,go – went , take – took , buy – bought , get – got , read – read ,fly – flew , am/is – was , are – were , say – said , leave – left , swim – swam , tell – told , draw – drew ,come – came , lose – lost , find – found , drink – drank ,hurt – hurt , feel – felt (3)一般将来时: 基本结构: ①be going to + do; ②will+ do. be going to = will I am going to go swimming tomorrow(明天). = I will go swimming