基数变序数(共5页)

精选优质文档-倾情为你奉上英语基数变序数基变序，有规律，词尾加上-th。一，二，三，特殊记，词尾字母t，d，d。 八去t，九除e，ve要用f替，ty将y变成i，th前面有个e。 若是碰到几十几，前用基来后用序。 整十基数变序数，先把ty变成tie，要是遇上2位数，十位基数，个位序，th最后加上去！其主要形式： （1）从第一至第十九：onefirst twosecond/next threethird fourfourth fivefifth sixsixth sevenseventh eighteighth nineninth tententh eleveneleventh twelve twelfth thirteenthirteenth fourteenfourteenth fifteenfifteenth sixteensixteenth seventeenseventeenth eighteeneighteenth nineteennineteenth twentytwentieth thirtythirtieth thirty onethirty-first fifty twofifty second seventy threeseventy-third ninety nineninety-ninth英语名词单数变复数英语中名词可分为可数名词和不可数名词。可数名词在应用时有单数和复数形式。表示一个用单数，表示两个或两个以上用复数。复数名词的构成分为规则变化和不规则变化。1)单数名词加s: students, apples, bags, trees, books, brothers. 2)以s、x、sh、ch结尾的名词加es: glasses,boxes,brushes,matches3)以辅音字母加y结尾的名词，变y为i加es: cities, babies, enemies.4)以f或fe结尾的名词，多数变f为v加es: wives, knives.但有些词只加s: roofs, proof s, chiefs. 5)以o结尾的名词，有些加es: Negroes,heroes,tomatoes, potatoes.其它加s:radios, zoos, pianos, photos. 6)不规则名词：footfeet, goosegeese, toothteeth, childchildren, manmen, womanwomen, sheepsheep, deerdeer, mousemice. 7)某些外来词变复数：datumdata, mediummedia, bacteriumbacteria,curriculumcurricula,criterioncriteria,phenomenonphenomena. (um/ona)analysisanalyses, basisbases, crisiscrises, diagnosisdiagnoses.(ises)8)复合名词变复数：以不可数名词结尾的复合名词无复数形式，如：homework. 以man或woman为前缀的复合名词变复数，前后两个名词都变复数，如：manservantmenservants, woman student women students. 其它复合名词变复数：grown upgrownups, brother in lawbrothers inlaw, stand bystands by.答案补充 9)复合形容词做定语时，其中的名词保持单数：a six year old boy，a two hundred page book 名词复数：）练习1.基数变复数onetwo three four- five six seven eight nine ten eleven twelveeighteen twentythirtythirty onefifty two seventy threefifty sixninety nine2.名词单数变复数bookbrotherglassboxbrushmatchcitybabyenemywifeknifefootgoosetoothchildmanwomansheepdeermouse 专心-专注-专业