一、where引导的特殊疑问句1用法：该特殊疑问句用来询问人或物所在的位置，其结构为“Where is单数名词？”或“Where are复数名词？”。也就是说where后面be动词是用is还是are取决于be动词后面的名词或代词的单复数形式。单数用is，复数用are。如：Where is my eraser？ 我的橡皮在哪儿？ Where are your keys？你的钥匙在哪儿？ 2答语：用Its介词短语(对应Where is.？)或Theyre介词短语(对应Where are.？)。如：Where is my eraser? Its on the desk. Where are your keys? They are on the sofa.可直接回答物品所在地点，省略its或theyre。当你不知道在哪，可用“I dont know”来回答，意为“我不知道”。 注意：dontdo not，其中do是助动词，用来帮助否定句或疑问句，当主语为第三人称单数时，助动词应用does，与not缩写为doesnt。如：She doesnt know.她不知道。二、介词in, on与under的用法1in意为“在里面，在内”，通常表示在某一空间里。如：My ring is in the bag.我的戒指在包里。 【拓展】in还可以表示地点、时间(后接年、月、日、世纪、早上、晚上等)及使用什么语言。如：in Wuhan在武汉；in the morning在早上；in 2012在2012年；in English用英语2on意为“在上面”，表示物体间有面的直接接触。如：A cup is on the desk.书桌上有个杯子。【拓展】on也可表示时间(后接具体某一天)。如：on Monday在星期一3under意为“在下面”。如：under the desk在课桌下面 写作案例同学们，你们的房间整洁漂亮吗？房间内的物品是怎样摆放的呢？请用本单元所学知识简单描述一下它们的位置，不少于50词。_ 思路点拨1可用开头：I have a nice room.Hello! Im. My room is nice and tidy.I have a small room, but its tidy.2教材中可用于此类作文的句型：This is my. Its on/in/under the.These are my. Theyre on/in/under the. 物品is/arein/on/under the.I have a物品Where is/aremy物品？Its/Theyre.You can see物品地点3可用的结尾：I like it very much.This is my room. What about yours? 美文欣赏I have a nice room. Its small, but its tidy. This is my bed. My quilt and my hat are on it. Under it is my basketball. This is my desk. My computer and my tape player are on it. My jacket is on the chair. And my schoolbag is on the chair, too. Oh, where are my books? They are in the bookcase. I like my room very much.