小学英语语法系列基数词序数词详细讲解免费下载免.ppt
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four 4 th fourth 序数词的变化 1 one first 2 twosecond 3 threethird 4 其余的序数词都是由基数词后加-th 变化而来的吗? five 5 th fifth twelve 12 th twelfth eight 8 th eighth nine 9 th ninth 20 th twentieth twenty 整十的序数词把 y 变成 i加-eth twentytwentieth Can you read? 1 thirtythirtieth 2 fortyfortieth 3 fifty fiftieth 序数词的定义 表示数目顺序的词用序数词。例如: first 第一,fifth 第五 序数词的构成 first 第一 second 第二 third 第三 fourth 第四 fifth 第五 sixth 第六? seventh 第七 eighth 第八 ninth 第九 tenth 第十 eleventh 第十一?? twelfth 第十二 thirteenth 第十三 nineteenth 第十九 twentieth 第二十 fortieth 第四十 fifty-first 第五十一 eight-third 第八十三 ninety-fourth 第九十四 1) 序数词1—19 除第一,第二,第三,第五,第八,第九,第十二变化不规则外,其余均由在基数词后加上-th。 2) 十位整数的序数词的构成方法是, 是将十位整数基数词的词尾y 变成 i 再加 -eth。 3) 几十几的序数词,只是把个位数变成序数词,十位数不变。 为了更简单地记忆,你只要记住下面这个基数词变序数词口诀就可以了: 1,2,3全都变,9少e,8少t,ve变f,ty变成tie,th最后加上去。? ? A:When is your birthday? B:My birthday is in . Which day?(哪一天?) It’s in June 2nd. June the second When is Teacher’s Day? It’s September10th. When is National Day? It’s October 1st. When is Independence Day? 美国独立日It’s______. July 4th 基数词变序数词歌 基变序,有规律: 词尾加上th(fourth,sixth) 一、二、三,特殊记; 结尾字母t,d,d(first,second,third); 八减t,九去e (eighth,ninth); ve要用f替(fifth,twelfth); ty将y变i; th前面有个e。 若是碰到几十几, 前用基来后用序。 one first twosecond threethird fourfourth fivefifth sixsixth sevenseventh eighteighth nineninth tententh 序数词 twentytwentieth thirtythirtieth fortyfortieth fiftyfiftieth sixtysixtieth seventyseventieth eightyeightieth ninetyninetieth tenth ninth eighth seventh sixth fifth fourth third second first ordinal numbers tenth ninth eighth seventh sixth fifth fourth third second first 一、二、三,特殊记, 加th从4起, 八少“t”,九去“e”, “ve”要用“f”替,(five, twelve) 见“y”变成“i”和“e”,词尾加上“th”, (twenty,thirty,ninety) 若是遇到几十几,只变个位就可以。 ordinal numbers(序数词 ) Can you write their ordinal numbers? 2 5 44 12 9 18 72 19 101 90 40 14 8 100 1000 December is the ________ month of the year. Monday is the _______ day of the week. English is spoken by most people as their _______
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