(3)谈话双方都知道的人或物:The boys aren’t at school.
(4)在序数词前:John’s birthday is February the second.
(5)用于固定词组中:in the morning/afternoon/evening
不用冠词的情况:
(1)专有名词前:China is a big country.
(2)名词前有定语:this,that,my,your,some,any,no等:
This is my baseball.
(3)复数名词表示一类人和事:Monkeys can’t swim.They are teachers.
(4)在节日,日期,月份,季节前:Today is Christmas Day.It’s Sunday.
(5)一日三餐前:We have breakfast at 6:30.
(6)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.
(7)学科名称前:My favorite subject is music.
(8)在称呼或头衔的名词前:This is Mr Li.
(9)固定词组中:at noon at night by bus
三、代词:人称代词,物主代词四、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:
⑴一般在词尾加er;
⑵以字母e结尾,加r;
⑶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;
⑷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)
五数词:基数词,序数词一、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