初中中数词.docVIP

初中数词 数词的种类和用法 难点精讲 基数词 1one16sixteen31thirty-one2two17seventeen40forty3three18eighteen50fifty4four19nineteen60sixty5five20twenty70seventy6six21twenty-one80eighty7seven22twenty-two90ninety8eight23twenty-three100one hundred9nine24twenty-four101one hundred and one10ten25twenty-five102one hundred and two11eleven26twenty-six123one hundred and twenty-three12twelve27twenty-seven1000One thousand13thirteen28twenty-eight1001one thousand and one14fourteen29twenty-nine2235two thousand, two hundred and thirty-five15fifteen30thirty【注意】 1.21-99之间的各数词，在十位数和个位数之间加连字符“-”。 2.101-999之间的数词，在百位数hundred后应加and，但有时在百位数与十位数之间的and可省略，特别在美国，如：one（a）hundred（and）sixty-six。 hundred，thousand，million（百万）前面有数词修饰时，用单数形式。如： There are nine hundred students in our school. 表示概述用hundreds of，thousands of 数词与其他词构成复合形容词，其中，名词要用单数形式，如： An eight-year-old boy 序数词 第1-第12第13-第19第20-第901st first 2nd second 3rd third 4th fourth 5th fifth 6th sixth 7th seventh 8th eighth 9th ninth 10th tenth 11th eleventh 12th twelfth13th thirteenth 14th fourteenth 15th fifteenth 16th sixteenth 17th seventeenth 18th eighteenth 19th nineteenth20th twentieth 30th thirtieth 40th fortieth 50th fiftieth 60th sixtieth 70th seventieth 80th eightieth 90th ninetieth第100以上100th hundredth 1000th thousandth 1,000,000th millionth【注意】 表示分数时，分子用基数词，分母用序数词。当分子大于1时，分母用复数形式，如：1/5( one-fifth ), 2/3( two-thirds ) 编号可用个序数词或基数词表示。序数词位于名词之前，并加定冠词。基数词位于名词之后。如： the fourth Lesson=Lesson Four the seventh paragraph=Paragraph seven the fifteenth page=Page Fifteen the ninth part=Part Nine 数、分数、小数、百分数 倍数 This cup is two times as big as that one. Three times three is nine. 分数 分数用基数词表示，分母用序数词表示，分子为2以上时，分母（序数词）应变为复数。 one-third two and three-fifths three-fifths five-twentieth thirty and seven-eighths 此外还有下面的表示法： a (one) half a (one) quarter three-quarter two and a quarter one and a half 小数 小数点前的基数词与前面所讲的基数词读法完全相同，小数点后面则须讲数字一一读出。 1.25