练习：写出下列各词的复数.
I ___we_ him them___ this _these___ her __their/them_ watch watches_ book_books__
child children_ photo photos_ diary _diaries day_days_ foot feet___ dress dresses___ tooth_teeth_ sheep _sheep_ box_boxes_ strawberry strawberries_ thief thieves_yo-yo _yo-yos_ peach_peaches_ sandwich sandwiches_ man_men womanwomen__ paper papers___ people_people_______
练习:写出下列动词的第三人称单数.
drink _drinks___ go _goes_ stay stays_ make makes__ look looks___
have__has pass_passes_ carry _carries come_comes__ watch_watches_
plant_plants__ fly __flies_ study_studies_ brush__brushes__ teach teaches__