大前天他给我打了电话。

He called me three days ago.

我大前天去看了电影。

I watched a movie three days ago.

大前天我买了一本新书。

I bought a new book three days ago.

大前天我见到了一个老朋友。

I met an old friend three days ago.

我们大前天在公园里散步。

We took a walk in the park three days ago.

三天以前，大前天。

Three days ago.

乔：嗯，我昨天、前天、大前天…都在这儿碰到你。

Joe : Well I saw you here yesterday and the day before that and the day before that…