it would be possible.改否定（内详）
问题描述：
it would be possible.改否定（内详）
It would be possible to have an observatory in our shcool.（改为否定句）
_____ _____ _____ _____to have an observatory in our shcool.
可不可以改成It wouldn't be possible to have an observatory in our shcool.
把possible 改成impossible是答案，那么我这个改句算错么？would改成wouldn't有问题么？
答
It would be impossible to have an observatory in our shcool.
impossible 是possible的反义词
这个句子考的应该就是possible的反义词,要明白出题人的意图~而且It would be ..时刻特定句式,有推测的意思,如果用It wouldn't be ..就太牵强了,语义和原来有了很大的变化~