脑洞英语语法系列课件_数词.pptxVIP

数词 什么是数词表示事物的数量和顺序的词。数词=基数词+序数词基数词：表示数量多少的词，如：one, two, ten等。序数词：表示数目顺序的词，如：first, second, tenth等。 基数词的构成1-12：独立成词one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve13-19：以teen结尾thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen 20-90：以ty结尾twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety21-99：两位数，中间要加连字符“-”twenty-one, twenty-two, twenty-three, twenty- four … ninety-nine101-999：三位数，百位后面加andone hundred and one … one hundred and ninety-nine … nine hundred and ninety-nine hundred, thousand, million, billion这四个词的前面如果有具体数字，就要用单数形式，后面接可数名词的复数。例如：four hundred boys（四百名男生）如果这四个词的前面没有具体数字，那么他们的后面要加上s+of，后面仍然接可数名词的复数。例如：hundreds of boys（数千名男生） 基数词变成序数词一般情况：均在词尾加-th。four-fourth, six-sixth, seven-seventh, ten-tenth等整十数：先把ty变为tie，再加-th。twenty-twentieth, thirty-thirtieth, forty-fortieth等 基数词变成序数词第几十几：十位数用基数词，个位数变序数词。 twenty-first, twenty-second, twenty-third等不规则变化：第一/二/三/五/八/九/十二first, second, third, fifth, eighth, ninth, twelfth 观看视频Q: Whats her phone number? 数词的种类有哪些？ Q: How many apples are there?A: There are apples.Q: Which apple is green?A: The one is green.seventhird基数词序数词基本顺序 如何表达数量？ 数字比拼Can you write 1-100 on the paper or the blackboard as fast as you can? 我发现：onetwothreefourfivesixseveneightnineteneleventwelve基数词1-12的拼写各不相同 我发现：thirteenfourteenfifteensixteenseventeeneighteennineteen基数词13-19都以-teen结尾thirteenfourteenfifteensixteenseventeeneighteennineteen悄悄告诉你：-teen是由ten变来的 twentythirtyfortyfiftysixtyseventyeightyninetytwentythirtyfortyfiftysixtyseventyeightyninety我发现：整十数都以-ty结尾 twenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivetwenty-sixtwenty-eighttwenty-seventwenty-nine我发现：表示几十几的中间要加连字符“-”twenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivetwenty-sixtwenty-eighttwenty-seventwenty-nine 大胆猜想How to write 101, 111, 121, 131, 141, 151, 161, 171, 181, 191 and 201? one hundred and oneone hundred and ninety-ninenine hundred and ninety-nine我发现：三位数要在hundred后加andone hundred and oneone hundred and n