复数：book,bus,watch,wish,boy,play,day,family,city,baby,tomato,potato,radio,knife,leaf,desk
问题描述：
复数：book,bus,watch,wish,boy,play,day,family,city,baby,tomato,potato,radio,knife,leaf,desk
答
以上单词的复数形式，依次为
books, buses, watches, wishes, boys, plays, days, families, cities, babies,tomatoes
值得注意的是：在可数名词中，s结尾的单词，变复数时+s；ch/sh变复数时+es；以f结尾的单词，变复数时，f变v并+es；以y结尾的单词，且前为辅音，变复数时，y变i并+es；以tomato为代表的单词，后加es
答
books, buses, watches, wishes, boys, plays, days, families, cities, babies,tomatoes
答
books buses watches wishes boys plays days families cities babies tomatoes potatoes radios knives leaves desks注意名词复数形式的变化1 在一般名词后面直接加‘s’.2 以s x sh ch 结尾的名词后加‘es’.3以o...
答
book-books
bus-buses
watch-watches,
wish-wishes
boy-boys
piay-plays
day-days
family-families
city-cities
baby-babies
tamato-tomatoes