Module 3 Unit 3 中，我们学习了一些表达家具变化的句子。那么，要准确的表达物体的方位，我们要学会正确使用方位介词，如: in, on, under, behind, next to, in front of 等。
这一期，一起来总结表示方位的介词，学习它们的用法吧。
1. on 在……上面 (指与物体表面接触)
eg: on the floor on the tree
2. In 在……里面
eg : in my backpack in the tree
3. under 在…… 下面
eg: under the chair
4. next to 紧接着… 在…旁边
eg: next to the sofa
5. between 在…之间
eg: between the sofa and chair
6. behind 在……后面
eg: behind the door
来看一组例句：
It's in the box. 它在盒子里面。
It's on the box. 它在盒子上面。
It's under the box. 它在盒子下面。
It's behind the box. 它在盒子后面。
It's in front of the box. 它在盒子前面。
考考你：
翻译句子： -你的书在哪儿？ -在椅子上。
A. Where are your books? They're on the chair.
B. Where are your books? They're under the chair.
C. Where is your books? It's on the chair.
D. Where is your books? It's under the chair.
-------------------------------------------------------------
