Unit 4,Wheres my schoolbag,Introduce,Wheres my schoolbag? Its on the bed,Words,on n 【用法】on是介词,表示“在.上”之意,常用例句：Are they on the sofa? 他们在桌子上吗,小练习：单项选择 Where is your map? It is_ the wall（墙）. A. on B. in C. over D. above,A。句意：你的地图在哪儿？它在墙_.根据题意，此处考查“在.上,Words,know n 【用法】know是动词,表示“知道,了解,认识”之意,常用例句： Do you know the boy?你认识那个男孩吗,小练习：单项选择 Where is my book? _,I dont know. A. OK B. All right C. Sorry D. well,C . 日常交际中还通常在I dont know前加Sorry./Im sorry. 表示礼貌,Words,tidy tadi 【用法】tidy用作形容词,意为“整
