三天以前，大前天。

Three days ago.

youdao

大前天晚上落了一夜的雨，我在床上翻来复去，总是睡不着。

There was a storm a few nights ago, and I lay on my bed, unable to sleep .

youdao

大前天晚上落了一夜的雨，我在床上翻来复去，总是睡不着。

There was a storm a few nights ago, and I lay on my bed, unable to sleep .

youdao