请问一英语问题

来源：百度知道 编辑：UC知道 时间：2024/06/20 20:38:38
paint that boocase!
I've already done so
I painted that bookcase a year ago OR I did so a year ago
请问第三句中,前面那句是正确的还是后面的是正确的呢?

I painted that bookcase a year ago.

前半句是 I painted that bookcase, 后面只需要时间状语，所以用a year ago,就很好。 so 是指上文提到的事情。可以这样用。 He asked me to paint that bookcase, and I did so.

i painted the book a year ago

so have I