(
课件网) 语法专题：数词 2026届一轮复习 考点一、基数词和序数词的相互转换 考点二、与数词相关的表达法 考点三、易混易错数词考点 考点四、考查倍数表达法 考点一、基数词和序数词的相互转换 1.一般来说，序数词是由相应的基数词词尾加th构成。 2.十位整数序数词的构成方法是将y变为i，再加eth。 3.两位或两位以上的基数词变成序数词时，仅将个位数变成序数词。 此外，常考的基数词、序数词一般会在100以内。 one—first two—second three—third four—fourth five—fifth six—sixth seven—seventh eight—eighth nine—ninth ten—tenth eleven—eleventh twelve—twelfth thirteen—thirteenth fourteen—fourteenth fifteen—fifteenth sixteen—sixteenth seventeen—seventeenth eighteen—eighteenth nineteen—nineteenth twenty—twentieth thirty—thirtieth forty—fortieth fifty—fiftieth sixty—sixtieth seventy—seventieth eighty—eightieth ninety—ninetieth 1.Today is my brother’s_____ (five) birthday, so we plan to have a big dinner for him. （答案：fifth） 2.The _____(two) lesson on Monday morning is always English, which I like very much. （答案：second） 3.Our team won the_____ (three) prize in the school sports meeting last week. （答案：third） 4.My family will move to the _____(eight) floor of the new building next month. （答案：eighth） 5.The_____ (nine) month of a year is September, and it’s usually the start of a new school term. （答案：ninth） 6.He finished the _____(twelve) task before noon, so he had time to rest in the afternoon. （答案：twelfth） 7.The _____(fifteen) day of the first lunar month is the Lantern Festival in China. （答案：(fifteenth） 8.This is the _____(twenty) time I’ve called him, but he still doesn’t answer the phone. （答案：twentieth） 9.Her grandmother’s (sixty) birthday party will be held in the countryside this year. （答案：sixtieth） 10.The_____ (ninety) page of this book has a beautiful illustration of a mountain village. （答案：ninetieth） 考点二、与数词相关的表达法 1.分数是由基数词作分子，序数词作分母构成的。除了分子是＂1＂的情况外，序数词都要用复数。 2.表示某人的大约年龄，即“几十多岁”时，使用基数词的复数形式。“in sb.'s＋整十的基数词的复数”意为“在某人几十多岁时”。如：in his fifties。 3.当hundred, thousand, million, billion前面有基数词时，用单数形式，词尾不加-s；前面有many, several, a few修饰时，仍用单数形式。如：several billion years。 4.“数词＋普通名词＋形容词”构成的合成形容词中，数词和普通名词都要用单数形式。 an eight-year-old boy一个八岁的男孩 a 100-meter-long bridge一座100米长的桥 5. 表示年代时，用“in the +逢十的基数词的复数”。基数词的复数若用阿拉伯数字表示，可直接加s，也可加’s，如in the 1950s / 1950’s。 1.About two _____(third) of the students in our class have joined the school music club. （答案：thirds） 2.My grandfather started learning to use a smartphone when he was in his_____ (seventy). （答案：seventies） 3.The scientist spent over three _____(thousand) days doing experiments to prove his theory. （答案：thousand） 4.Only one_____ (four) of the apples in the b ... ...
