6 sentences

1. 这个小男孩非常顽皮。

   zhè gè xiǎo nán​hái fēi​cháng wán​pí.

   This little boy is very naughty.

   Source: Dong Chinese Dictionary

2. 那个顽皮的崽子到处乱跑。

   nà gè wán​pí de zǎi zi dào​chù luàn pǎo.

   That naughty little brat is running all over the place.

   Source: Dong Chinese Dictionary

3. 这个顽皮的孩子真让人伤脑筋。

   zhè​ge wán​pí de hái​zi zhēn ràng rén shāng​nǎo​jīn.

   This naughty child is a real handful.

   Source: Dong Chinese Dictionary

4. 几个顽皮的孩子把家里闹得天翻地覆。

   jǐ gè wán​pí de hái​zi bǎ jiā lǐ nào de tiān​fān​dì​fù.

   A few naughty children turned the house upside down.

   Source: Dong Chinese Dictionary

5. 这孩子以前很顽皮，到了初中好像突然开窍了。

   zhèi hái​zi yǐ​qián hěn wán​pí, dào le chū​zhōng hǎo​xiàng tū​rán kāi​qiào le.

   The child used to be very naughty, but he seemed to suddenly wise up in junior high.

   Source: Dong Chinese Dictionary

6. 他总是喜欢作弄新来的同学，大家都觉得他很顽皮。

   tā zǒng​shì xǐ​huan zuò​nòng xīn lái de tóng​xué, dà​jiā dōu jué​de tā hěn wán​pí.

   He always likes to play tricks on new students; everyone thinks he is mischievous.

   Source: Dong Chinese Dictionary