预约成功
1)单数名词加s: students, apples, bags, trees, books, brothers.? $lesson$
2)以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches.?转自环 球 网 校edu24ol.com
3)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: radio s, zoos, pianos, photos.?
6)不规则名词：foot→feet, goose→geese, tooth→teeth, child→children, man→me n, 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, woman student women students.?
其它复合名词变复数：grown?up→grown?ups, brother?in?law→brothers?in?law, stand?by→stands?by.?
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
【例句】?A second doctor must confirm that these criteria ______ and the death must be re ported to the police department.?
A) has been met
B) have been met?
C) was met
D) was being met?
criteria是复数形式，故A，C，D都为错误选项。正确答案为B。转自环 球 网 校edu24ol.com
1) The university authorities are seriously considering abandoning the traditional______class.?
A) fifth minutes
B) fifty?minutes?
C) fifty?minute
D) fifty minute's?
复合形容词用作定语时，其中的名词不变复数，故B不对。A不能做定语，D应为fifty minutes'，正确答案为C。
