She couldn't find her bag.It wasn’t (there).在此为什么不是用theres?

问题描述:

She couldn't find her bag.It wasn’t (there).在此为什么不是用theres?
不对是theirs。She couldn't find her bag。It wasn’t (there)。在此为什么不是用theirs?

我学这么久还没见过theres,那里是个副词哪有加s的啊