3 sentences

1. 他们正密谋策划一次武装叛乱。

   tā​men zhèng mì​móu cè​huà yī cì wǔ​zhuāng pàn​luàn.

   They are plotting an armed rebellion.

   Source: Dong Chinese Dictionary

2. 凶手承认自己曾密谋谋害那名富商。

   xiōng​shǒu chéng​rèn zì​jǐ céng mì​móu móu​hài nà míng fù​shāng.

   The killer confessed that he had conspired to murder the wealthy merchant.

   Source: Dong Chinese Dictionary

3. 警方挫败了一起刺杀总统的密谋。

   jǐng​fāng cuò​bài le yī​qǐ cì​shā zǒng​tǒng de mì​móu.

   Police foiled a plot to assassinate the president.

   Source: Dong Chinese Dictionary