4 sentences for 忙活 (máng​huo — be busy)

1. 全家人都在为婚礼忙活。

   quán jiā​rén dōu zài wèi hūn​lǐ máng​huo.

   The whole family is busy preparing for the wedding.

   Source: Dong Chinese Dictionary

2. 为了帮我搬家，让你受累忙活了一整天。

   wèi​le bāng wǒ bān​jiā, ràng nǐ shòu​lèi máng​huo le yī zhěng tiān.

   You worked so hard all day helping me move.

   Source: Dong Chinese Dictionary

3. 虽然忙活了半天，他的口袋里还是空空的。

   suī​rán máng​huo le bàn​tiān, tā de kǒu​dài lǐ hái​shi kōng​kōng de.

   Despite working for a long time, his pockets were still empty.

   Source: Dong Chinese Dictionary

4. 他在厨房里忙活了半天，用牛骨熬制了一锅味道浓郁的肉汤。

   tā zài chú​fáng lǐ máng​huo le bàn​tiān, yòng niú​gǔ áo​zhì le yī guō wèi​dao nóng​yù de ròu​tāng.

   He spent a long time busy in the kitchen simmering a pot of rich broth using beef bones.

   Source: Dong Chinese Dictionary