I didn't know she could swim 中为什么用could

来源：学生作业帮助网编辑：作业帮时间：2024/05/02 23:08:15

I didn't know she could swim 中为什么用could
I didn't know she could swim 中为什么用could

I didn't know she could swim 中为什么用could
因为前面用了didn't,一句话中的语态要一致