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小学英语2020-04-02 10:16

  2. 用法:

  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

  代词、形容词、副词

  代词:人称代词,物主代词

  

  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)

  数词:序数词、基数词

  (1) 1-20

  one,two, three,  our, 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) 1,000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 bilion

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