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 foot-feet,.tooth-teeth fish-fish, people-people, Chinese-Chinese, Japanese-Japanese

　　练习：写出下列各词的复数。

　　I _________  him _________  this _______  her ______   watch _______ book_______

　　child _______ photo ________ diary ______   day________  foot________ dress ________ tooth_______ sheep ______   box_______  strawberry _____ thief _______yo-yo ______ peach______ sandwich ______ man______   woman_______ paper_______ people________

　　二．动词三单的变化规则

　　1．一般情况下，直接加-s，如：cook-cooks, milk-milks

　　2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes

　　3．以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies

　　练习: 写出下列动词的第三人称单数。

　　drink ________   go _______   stay ________   make ________   look _________

　　have_______    pass_______   carry ____      come________    watch______

　　plant_______    fly ________   study_______   brush________    teach_______