He is a student.She is a girl from Japan.Tom is a handsome boy.His father is a laid-off worker.You are right.They are wrong.We are good friends.Jane and Mary are classmates.可以分一下类吗？明天上台要展示，比如：复数形式：……顺便加多一点单数形式is的造句：1.He is a student. 2.She is a girl from Japan.3.Tom is a handsome boy.4.His father is a laid-off worker复数形式are造句：1.You are right.2.They are wrong.3.We are good friends.4.Jane and Mary are classmates. 5.There are two books on the desk.6.His parents are leaving for Peking.