关于主语从句的疑问句The apple you bought yesterday is a bad one.的疑问句是?Is the apple you bought yesterday a bad one?还是:Did the apple you buy yesterday is a bad one?为什么?
问题描述：
关于主语从句的疑问句
The apple you bought yesterday is a bad one.
的疑问句是?
Is the apple you bought yesterday a bad one?
还是:
Did the apple you buy yesterday is a bad one?
为什么?
答
The apple you bought yesterday is a bad one.
疑问句是Is the apple you bought yesterday a bad one?
这是定语从句，而不是主语从句。从句为you bought yesterday，作修饰成分，可以无视它，然后就明了了
疑问句主要看主句
答
Is it the apple what you bought yesterday is a bad one ?
答
Is the apple you bought yesterday a bad one?
因为 you bought yesterday是从句，the apple is a bad one 是主句...
答
第一个
因为原句的动词时is，所以变一般疑问句时把is提前
答
Is the apple you bought yesterday a bad one?这句是正确的
不能把从句变成疑问句,而是变主句.