Bill knows who _________

问题描述:

Bill knows who _________
A.our teacher is
B.is our teacher
可不可以选B

这个题目出得不严谨,AB其实都可以,只是A更常用一点.
1.此题考查宾语从句的构成和句序.
宾语从句结构:引导词 + 陈述句.
如果该从句缺少成分,则使用相应疑问词充当引导词.
2.Bill knows who our teacher is.比尔知道我们老师是谁.
其中,who在从句中充当表语,和is构成系表结构.
假设陈述句为:Your teacher is Li Ming.
其特殊疑问句(对Li Ming划线提问)为:Who is our teacher?
如果它做宾语从句即为:who(引导词)+ our teacher is (陈述句序:our teacher主语 + is系动词谓语)
3.Bill knows who is our teacher.比尔知道谁是我们的老师.
其中,who在从句中充当主语.
假设陈述句为:Li Ming is your teacher .
其特殊疑问句(对Li Ming划线提问)为:Who is our teacher?
如果它做宾语从句即为:who (引导词)+ is our teacher(陈述句序:主语who +系动词谓语is + 表语our teacher)