4 sentences

1. 我突然间没心情了。

   wǒ tū​rán​jiān méi xīn​qíng le.

   Suddenly, I'm not in the mood.

   Source: OpenSubtitles

2. 他正要说话，突然间电话响了。

   tā zhèng yào shuō​huà, tū​rán​jiān diàn​huà xiǎng le.

   He was about to speak when suddenly the phone rang.

   Source: Dong Chinese Dictionary

3. 突然间，我不知道发生了什么事。

   tū​rán​jiān, wǒ bù zhī​dào fā​shēng le shén​me shì.

   Suddenly, I don't know what happened.

   Source: OpenSubtitles

4. 突然间知道了他的叔叔原来是他爸爸。

   tū​rán​jiān zhī​dào le tā de shū​shu yuán​lái shì tā bà​ba.

   Suddenly his uncle turns out to be his father.

   Source: OpenSubtitles