应该是一个名词性从句,准确讲是名词性从句中的宾语从句.这个例子比较特殊,where引导的句子作形容词sure的宾语,形容词后也可以跟宾语,这个语法书上讲的少,但这种句子挺常见.比如: I am glad that you are satisfied with your job. 你对工作满意我感到很高兴.(that引导的从句做形容词glad的宾语) I'm not sure why she refused their invitation.我尚不能肯定她为什么拒绝他们的邀请.(why.) She's doubtful whether we shall be able to come.她怀疑我们是否能够前来.(whether.) 都是形容词后跟宾语从句吧?不明白,再问吧!
宾语从句 形容词的宾语从句 常用来引导宾语从句的形容词有: sure,certain,glad,please,happy,sorry,afraid,satisfied,surprised I am sure I will pass the exam. 我确信我会通过考试. I am sorry that I have troubled you so long...