四、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。
动态针分割线
五、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在周末---特指
at(on)weekends在周末---泛指
over the weekend在整个周末
during the weekend在周末期间
(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)
动态针分割线
六、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 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 |