Section B (1a-1e),任务:把苹果放到合适的位置(可重复放置)1.A book is the playground. 2.Two old men are playing chess the tree. 3.There are some birds the tree.,on,under,in/under,The English books are under the radio.英语书在收音机下面。 剖析 介词under意为“在下”。如: They are under the tree.他们在树下。 拓展 under的反义词为on。 (1)介词on表示“在上”。如: Look!Your watch is on the desk. 看!你的手表在课桌上。 (2)介词on还可表示“在(树)上结(果实)”。如: There are some apples on the tree. 树上结了一些苹果。,
