是on the sofa还是in the sofa?

in the sofa 还是 on the sofa? 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? 是用in the sofa还是on the sofa? on the sofa还是on sofa对? on the sofa还是on a sofa 为什么是on the sofa,而不是in the sofa? 我坐在沙发上是 I sit in the sofa.还是 I sit on the sofa. 呆在沙发上是on the sofa还是 in the sofa? on the sofa还是in the sofa on the bed还是in the bed on the chair in the sofa 与on the sofa的区别