基数变序数.doc

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—first
two—second/next
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
een—eenth
twenty—twentieth
thirty—thirtieth
thirty one—thirty-first
fifty two—fifty second
seventy three—seventy-third
y nine—y-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, : roofs, proof s, chiefs.
5)以o结尾的名词,有些加es: Negroes,heroes,tomatoes, :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