3 sentences

1. 我的工作时间很长。

   wǒ de gōng​zuò shí​jiān hěn cháng.

   I work long hours.

   Source: OpenSubtitles

2. 我们的工作时间很灵活。

   wǒ​men de gōng​zuò shí​jiān hěn líng​huó.

   Our working hours are very flexible.

   Source: Dong Chinese Dictionary

3. 他没有固定的工作时间。

   tā méi​yǒu gù​dìng de gōng​zuò shí​jiān.

   He doesn't have fixed working hours.

   Source: Dong Chinese Dictionary