看看这句英语有语病么？

来源：百度知道 编辑：UC知道 时间：2024/05/30 19:21:47
If there still exist unknown things somewhere, the only possibility is that it is not mine
或者
If there still be unknown things somewhere, the only possibility is that it is not mine

exist要加s 第二句中的话 be 改成is吧

第一个肯定错。。THERE BE 句型 +虚拟语气 ，不能用现在时
if there was still some unknown things somewhere,the only possibility must have been that it is not mine

If there are still unknown things somewhere, the only possibility is that they are not mine.

If there are still unknown things somewhere, the only possibility is that they are not mine

exists