7 sentences

1. 他整天寻欢作乐，不务正业。

   tā zhěng​tiān xún​huān​zuò​lè, bù​wù​zhèng​yè.

   He spends all day seeking pleasure and neglecting his duties.

   Source: Dong Chinese Dictionary

2. 他整天游手好闲，不务正业。

   tā zhěng​tiān yóu​shǒu​hào​xián, bù​wù​zhèng​yè.

   He idles around all day and doesn't do any proper work.

   Source: Dong Chinese Dictionary

3. 他整天不务正业，到处游荡。

   tā zhěng​tiān bù​wù​zhèng​yè, dào​chù yóu​dàng.

   He neglects his duties all day and wanders around aimlessly.

   Source: Dong Chinese Dictionary

4. 他整天和那帮不务正业的人鬼混。

   tā zhěng​tiān hé nà bāng bù​wù​zhèng​yè de rén guǐ​hùn.

   He fools around all day with that bunch of idle, good-for-nothing people.

   Source: Dong Chinese Dictionary

5. 他经常和那群不务正业的人搅和在一起。

   tā jīng​cháng hé nà qún bù​wù​zhèng​yè de rén jiǎo​huo zài​yī​qǐ.

   He often hangs out with that group of idlers.

   Source: Dong Chinese Dictionary

6. 他整天不务正业，在他父亲眼里就是个废料。

   tā zhěng​tiān bù​wù​zhèng​yè, zài tā fù​qīn yǎn lǐ jiù shì gè fèi​liào.

   He idles his time away and is seen as a good-for-nothing in his father's eyes.

   Source: Dong Chinese Dictionary

7. 他成天就知道打游戏，不务正业。

   tā chéng​tiān jiù zhī​dào dǎ​yóu​xì, bù​wù​zhèng​yè.

   He spends all day playing games and doesn't do any honest work.

   Source: Dong Chinese Dictionary