I shall borrow the book ,if it is yours.用虚拟语气写出与将来相反的虚拟条件句
问题描述：
I shall borrow the book ,if it is yours.用虚拟语气写出与将来相反的虚拟条件句
与过去、现在的我写出来了,这个与将来的我写了但觉得不对,
答
I should borrow the book if it were to be yours.
I should borrow the book if it should be yours.
不能用I should borrow the book if it were yours,这是对现在的虚拟
请参考虚拟语气谓语变化表
虚拟时间 主句谓语 IF从句谓语
将来 would(should/could)+do were to do/should do
现在 would(should/could)+do were/did
过去 would(should/could)+have done had done