guess变换成第三人称单数怎么写？

一、名词复数规则
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, brush-brushes, watch-watches
3．以“辅音字母+y”结尾，变y为i, 再加-es，如：family-families, strawberry-strawberries
4．以“f或fe”结尾，变f或fe为v, 再加-es，如：knife-knives
5．不规则名词复数：
man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice
child-children

+es