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:四、同音异形词如:to/too/two,their/there,right/write,pair/pear,four/for,know/no,sun/son.五、反义词如:day-night,come-go,yes-no,up-down,big-small.short-longall,fat-thin,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,...