新概念3有个句子不太明白
问题描述：
新概念3有个句子不太明白
experts confirmed that a puma will not attack a human being unless it is cornered.为什么这里will不用过去式啊
The experts were now fully convinced that the animal was a puma 这个句子你看都用过去式
答
experts confirmed that a puma will not attack a human being unless it is cornered.这里a puma will not attack a human being unless it is cornered阐述的是客观规律,不需要改变时态.