英语单词复数形式什么情况加s什么情况?什么情况下加es?答:low-high,slow-fast,六、名词复数的变化规则1.一般情况下,直接加s,如:book-books,bag-bags,cat-cats,bed-beds.2.以s,x,sh,ch结尾,加es,如:bus-buses,box-boxes,watch-watches.3.以辅音字母加y结尾,变y为i,再加es,如:family-families,hobby-hobbies.4.以f或fe结尾,变f或fe为v,再加es,如:thief-t...