budu

In a sentence

• Kada budu spremni, krenut ćemo.

  When they are ready, we will start.

  Here, 'budu' is used as the third person plural future active subjunctive of the verb 'biti' (to be), representing 'they be ready' in a conditional future clause.

• Želim da oni budu sretni.

  I want them to be happy.

  In this sentence, 'budu' again represents the third person plural form of 'biti' (to be), but used in a subjunctive tense governed by the verb 'želim' (I want).

• Nadam se da će oni biti ono što žele da budu.

  I hope they will be what they want to be.

  Here, 'budu' is used in a complementary conjunction clause translating to 'they want to be'; it holds a subjunctive form conveying desired action.