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词法

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(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

动词:动词的四种时态:

– 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 tomorrow.

(4)现在进行时: am,is,are+动词现在分词

动词现在分词详解动词的ing形式的构成规则:

①一般的直接在后面加上ing,如doing , going , working , singing , eating

②以e 结尾的动词,要先去e再加ing,如having , writing

③双写最后一个字母的(此类动词极少)有:running , swimming , sitting , getting ?

(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

数词:基数词、序数词

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。 ?

(一)、形容词的比较级

形容词,副词:比较级,最高级