在椅子上是in the chair还是on the chair?为什么?为什么在公交车上是用on而在车里用in?

做在椅子上是 还sit on the chair 还是sit on the chair 在椅子上是in the chair还是on the chair?为什么?为什么在公交车上是用on而在车里用in? 坐在椅子上用sit on the chair 还是sit in the chair on the chira和in the chair的区别在椅子上是用ON THE CHAIR 还是 IN THE CHAIR? 是sit on the chair还是sit in the chair 坐在椅子上是 sitting on a chair / sitting in a chair / sitting down a chair哪些是对的? 求坐在椅子上的英语?是sit in chair还是sit on chair?那说坐在或躺在床上的呢？ in the barber’s chair 坐在理发店的椅子上为什么用in 问一道英语短语题跳过椅子是jump past the chair还是jump pass the chair还是别的? 猫在椅子上吗?用英语怎么说?（）the cat（）the chair? 是in chair还是on chair I was in the barber's chair. barber意思是理发师.那这句话的翻译是：“我坐在理发师的椅子上.”吗? 我的录像带在地板上椅子下.用英语Look!my( )()is()the floor()the chair. 是sit in a chair还是sit on a chair? 是sit in a chair还是at a chair Emma is sitting in her chair on the apothecary table and Rachel is .Emma is sitting in her chair on the apothecary table and Rachel is trying to make her laugh.apothecary table （Emma是婴儿,坐在小椅子上） on the sofa还是in the sofa on the bed还是in the bed on the chair还是in the chairon the sofa还是in the sofa on the bed还是in the bed on the chair还是in the chair?急!~~~在什么情况下用in什么情况下用on呢?请高人指点啊·· 小心从椅子上摔下来 Be careful not to ___ ____ the chair