一个英语句子找错改正,she is very young then.有三个地方错了--she young then ,找出一处来,并改正.请说出理由.

问题描述:

一个英语句子找错改正,
she is very young then.有三个地方错了--she young then ,找出一处来,并改正.请说出理由.

she was very young then.
then表示那时,用第三人称一般过去时was。

is改成was