高中英语插入语

问题描述:

高中英语插入语
Niobody but doctors or nurses and those invited by Dr Hu is allowed to enter the patients' room.
特别是"Niobody but doctors or nurses ".我们老师说Niobody but是插入语,allowed前面的谓语动词要看插入语,所以用is,但我还是不懂

没有人被允许进入病人的房间,出了医生或者护士和那些受Dr Hu 邀请的人.
这个句子可以这样理Nobodayis allowed to enter the patients' room,butdoctors or nurses and those invited by Dr Hu.这句话的主语是Noboday 所以谓语就是is.
butdoctors or nurses and those invited by Dr Hu,是这句话的插入语,去了对句子也无影响.
看懂了吗?