Welcome to English class,Unit 2 Cleaning Day,Part A,Whats in the classroom,chair,desk,window,door,classroom,blackboard,Singing, singing, he is singing,Dancing, dancing, he is dancing,Running, running, they are running,动词加ing表示正在进行,clean 把.弄干净,Lets clean our classroom,clean the window,Sally is cleaning the window,clean the desk,Lily is cleaning the desks,clean the chair,Julia is cleaning the chairs,clean the door,Wang Tao is cleaning the door,clean the blackboard,Yang Ming is cleaning the blackbo
