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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:one—firsttwo—second/nextthree—thirdfour—fourthfive—fifthsix—sixthseven—seventheight—eighthnine—ninthten—tentheleven—eleventhtwelve—twelfththirteen—thirteenthfourteen—fourteenthfifteen—fifteenthsixteen—sixteenthseventeen—seventeentheighteen—eighteenthnineteen—nineteenthtwenty—twentieththirty—thirtieththirtyone—thirty-firstfiftytwo—fiftysecondseventythree—seventy-thirdninetynine—ninety-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,proofs,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:foot→feet,goose→geese,tooth→teeth,child→children,man→men,woman→women,sheep→sheep,deer→deer,mouse→mice.7)某些外来词变复数:datum→data,medium→media,bacterium→bacteria,curriculum→curricula,criterion→criteria,phenomenon→phenomena.(um/on→a)analysis→analyses,basis→bases,crisis→crises,diagnosis→diagnoses.(is→es)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:manservant→menservants,womanstudentwomenstudents.其它复合名词变复数:grownup→grownups,brotherinlaw→brothersinlaw,standby→standsby.答案补充9)复合形容词做定语时,其中的名词保持单数:asixyearoldboy,atwohundredpagebook名词复数:)练习1.基数变复数one—two—three—four-five—six—seven—eight—nine—ten—eleven—twelve—eighteen—twenty—thirty—thirtyonefiftytwoseventythreefiftysixninetynine2.名词单数变复数book—brother——glass——box——brush——match——city——baby——enemy——wife——knife——foot——goose——tooth——child——man——woman——sheep——deer——mouse——
本文标题:基数变序数
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