3 sentences

1. 我没那么不负责任。

   wǒ méi nà​me bù fù​zé​rèn.

   I'm not that irresponsible.

   Source: OpenSubtitles

2. 他在工作中是个非常负责任的组长，深得大家的信任。

   tā zài gōng​zuò zhōng shì gè fēi​cháng fù​zé​rèn de zǔ​zhǎng, shēn​dé dà​jiā de xìn​rèn.

   He is a very responsible team leader at work and is deeply trusted by everyone.

   Source: Dong Chinese Dictionary

3. 你应该对这起事故负责任。

   nǐ yīng​gāi duì zhè qǐ shì​gù fù​zé​rèn.

   You should take responsibility for this accident.

   Source: Dong Chinese Dictionary