has lan sold his house yet为什么要加yet

问题描述:

has lan sold his house yet为什么要加yet
如果我不加yet~直接has lan sold his house 可以吗会有什么不一样的呢

可以,yet在这里=already,表示结果,只不过疑问句中不能用already,所以只能用yet.
不加yet也是可以的.