Unit One Grammar 基数词和序数词
one first two second three third four fourth five fifth eight eighth nine ninth twelve twelfth thirteen thirteenth nineteen nineteenth twenty twentieth twenty-three twenty-third forty fortieth fifty fiftieth ninety ninetieth
1st first 2nd second 3rdthird 5thfifth 8theighth 12thtwelfth 基变序有规律，结尾字母是 th; 一、二、 三，特殊记，结尾字母是 t, d, d ；八去 t, 九 去 e; f 要把 ve 替。 ty 将 y 变成 i, th 前面有 个 e ；几十几，也好记，只变个位就可以。 9thninth
The first month of the year is second third fourth fifth sixth eleventh seventh eighth ninth tenth twelfth February March April May June July August September October November December January.
写出下列日期的英文表达法 1. 3 月 12 日 2. 8 月 8 日 3. 1 月 5 日 4. 7 月 20 日 月 1 日 6. 9 月 9 日 7. 4 月 3 日 月 2 日 9. 2 月 14 日 月 30 日 月 23 日 月 21 日 March 12th August 8th January 5th July 20th December 1st September 9th April 3th November 2nd February 14th May 30th June 23rdOctober 21st
Read the dates: Writing( 写法） Reading （读法） January 1st March 8th August 2nd September 10th July 3rd February 12th October 20th December 25th January (the) first March (the) eighth August (the) second September (the) tenth July (the) third February (the) twelfth October (the) twentieth December (the) twenty-fifth
4. 序数词常用作名词的定语，但当名词前面已有物主代 词等限定词时，则不能再用 the 。 如： The second boy likes playing baseball. 序数词的用法： 1. 序数词前一般要加定冠词 the 。 如： The first boy is my brother. 2. 表示编号时，常把基数词放在名词后面来表示 顺序， 基数词和名词首字母要大写。相当于 “the + 序数词 + 名词 ” 。 如： Lesson Five = the fifth lesson 3. 表示分数时，基数词作分子，序数词作分母， 当分 子大于 1 时，分母要用复数。 如： 1/4 one fourth; 2/5 two fifths