1、单数名词变成复数形式的不规则变化:1.child—children man—men woman—women foot—feet tooth—teeth mouse—mice goose--geese ox—oxen

4、German Norman Roman的复数形式是在词尾加“-s”。 Germans Normans Romans
5、复合名词的复数形式一般由其中心词的复数形式来确定。 grand-child grand-childre荏鱿胫协n father-in-law fathers-in-law editor-in-chief editors-in-chief

8、有些名词以“-s”结尾,但它们一般都被看作单数。 physics politics phonetics mathematics/maths