I believe that this house is for sale.请问这为什么要用that this?

I believe that this house is for sale.请问这为什么要用that this? I believe that this house is for sale.这句话中为什么要用that? 请问英语语法 I believe that this house is for sale I believe that this is house is for sale 在I believe that this house is for sale.中的that,this分别是什么意思,两个 i believe that this car is for sale这里为什么用介词for I believe (that this is house is for sale)对括号部分提问 I believe( that this is house is for sale ).对划线部分提问 连词成句believe you that this for do car is sale This is the house which is for sale.这句话中的which 是否可以换为that 英语翻译用适当的介词填空：1.I believe that this car is _______ sale.2.Tha This House Is Not For Sale 歌词