5 sentences

1. 他弟弟前天去上海了。

   tā dì​di qián​tiān qù Shàng​hǎi le.

   His younger brother went to Shanghai the day before yesterday.

   Source: Tatoeba

2. 她前天给我打过电话。

   tā qián​tiān gěi wǒ dǎ guo diàn​huà.

   She called me the day before yesterday.

   Source: OpenSubtitles

3. 我前天买了一本新书。

   wǒ qián​tiān mǎi le yī běn xīn shū.

   I bought a new book the day before yesterday.

   Source: Dong Chinese Dictionary

4. 前天我梦见自己会飞。

   qián​tiān wǒ mèng​jiàn zì​jǐ huì fēi.

   The day before yesterday I dreamt I could fly.

   Source: OpenSubtitles

5. 事故发生在前天。

   shì​gù fā​shēng zài qián​tiān.

   The accident happened the day before yesterday.

   Source: Tatoeba