We will have a picnic if it ISN'T rain tomorrow.这个句子中为什么用 isn't 而_英语解答

We will have a picnic if it ISN'T rain tomorrow.这个句子中为什么用 isn't 而不用 doesn't 呢?讲解一
用doesn't吗？能不能讲解一下啊？

人气：263 ℃　时间：2019-10-09 11:48:48

解答

应该是dosen't~
rain在这里作动词
又it是单数,所以用doesn't