there is something unusal in the room ,A is there B isn't there c is it D ism't it
问题描述：
there is something unusal in the room ,A is there B isn't there c is it D ism't it
答
B isn't there
unusal 看做肯定,所以后半句用否定
there is 后半句也用there为什么unusal看做肯定(⊙o⊙)？含有否定意义的形容词（unusual）修饰不定代词（something）时，则仍看做肯定句式，没有为什么。英语语法规定的，没有为什么。只要系动词是肯定的，这个句子就是肯定句