in the sofa 还是 on the sofa?

in the sofa 还是 on the sofa? 是用in the sofa还是on the sofa? 是sit in the sofa 还是sit on the sofa? 是on the sofa还是in the sofa?我记得也是in the sofa, on the sofa还是on a sofa 我坐在沙发上是 I sit in the sofa.还是 I sit on the sofa. in the sofa还是on the sofa如果可以,请说为什么? on the sofa还是on sofa对?为什么？ in the sofa 与on the sofa的区别 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·· 呆在沙发上是on the sofa还是 in the sofa?I'm staying _______the sofa.请问横线上应该填什么,并说说理由. where is my book ? It is in the sofa.在沙发上是用in 还是on They are in the living room,on the sofa.中on the sofa 作什么成分? 是in the afternoon of April 30th 还是 on the afternoon of April 30th ( ) Jill( ) on the sofa? Look at the photo!My grand parents are_________ .A.in the sofa B.on the sofa C.of the sofa D.With the sofa 为什么是on the sofa,而不是in the sofa?求解答,急. There is a toy in the sofa.这句为什么不说on the sofa 呢