特殊疑问句的助动词和系动词.
问题描述：
特殊疑问句的助动词和系动词.
when was the house built?为什么不改成
when did the house build?
而且BUILD是实义动词啊,怎么能加系动词呢?
还有怎么决定什么时候用DO什么时候用系动词呢?
那既然是被动语态，为什么不变成when does the house was built or when the house was built?
答
be + 过去分词 是被动语态的结构
when was the house built?
The house was built in 1997.
当主语是动作的承受者时,用被动语态加系动词
do+ 动词原形
when did the house build?是个错的.
应该是When did they build the house?