10 sentences

1. 他们正在暗中图谋不轨。

   tā​men zhèng​zài àn​zhōng tú​móu bù​guǐ.

   They are secretly plotting something bad.

   Source: Dong Chinese Dictionary

2. 有人在暗中给他通风报信。

   yǒu rén zài àn​zhōng gěi tā tōng​fēng​bào​xìn.

   Someone was secretly tipping him off.

   Source: Dong Chinese Dictionary

3. 他暗中帮助了许多贫困学生。

   tā àn​zhōng bāng​zhù le xǔ​duō pín​kùn xué​sheng.

   He secretly helped many students in need.

   Source: Dong Chinese Dictionary

4. 这场政治谋划在暗中悄然进行。

   zhè cháng zhèng​zhì móu​huà zài àn​zhōng qiǎo​rán jìn​xíng.

   This political plotting is being carried out quietly in secret.

   Source: Dong Chinese Dictionary

5. 警方正在暗中监视嫌疑人的活动。

   jǐng​fāng zhèng​zài àn​zhōng jiān​shì xián​yí​rén de huó​dòng.

   The police are secretly monitoring the suspect's activities.

   Source: Dong Chinese Dictionary

6. 他总是暗中计算别人，所以没朋友。

   tā zǒng​shì àn​zhōng jì​suàn bié​ren, suǒ​yǐ méi péng​you.

   He's always scheming against others, which is why he has no friends.

   Source: Dong Chinese Dictionary

7. 官府正在暗中廉察他贪污受贿的证据。

   guān​fǔ zhèng​zài àn​zhōng lián chá tā tān​wū shòu​huì de zhèng​jù.

   The authorities are secretly investigating evidence of his corruption and bribery.

   Source: Dong Chinese Dictionary

8. 他总觉得有人在暗中窥视他的私生活。

   tā zǒng jué​de yǒu rén zài àn​zhōng kuī​shì tā de sī​shēng​huó.

   He always feels like someone is spying on his private life in the shadows.

   Source: Dong Chinese Dictionary

9. 我怀疑有人在暗中作怪，破坏我们的合作。

   wǒ huái​yí yǒu rén zài àn​zhōng zuò​guài, pò​huài wǒ​men de hé​zuò.

   I suspect someone is working behind the scenes to undermine our cooperation.

   Source: Dong Chinese Dictionary

10. 这两个企业为了市场份额一直在暗中较劲。

    zhè liǎng gè qǐ​yè wèi le shì​chǎng fèn'é yī​zhí zài àn​zhōng jiào​jìn.

    These two companies have been secretly competing for market share.

    Source: Dong Chinese Dictionary