PREP 在…里;在…之内
He was in his car.
他坐在他的车里。
I like to swim, especially in the sea.
我喜欢游泳，尤其喜欢在大海中游泳。
on
prep.（表示位置）在…上
He is sitting beside her on the sofa.
他挨着她坐在沙发上。
He threw a folded dollar on the counter.
他将折起的1美元钞票扔到柜台上。
under
prep.在…下面，在表面之下
He squirreled his gun away under a rock.
他把他的枪藏在了一块岩石下。
The student came along with an English dictionary under his arm.
这名学生腋下夹着一本英语词典走来。
