[*] 458. A Predicate Noun or Adjective after a complementary infinitive takes the case of the subject of the main verb:—
- “fierīque studēbam êius prūdentiā doctior ” (Lael. 1) , I was eager to become more wise through his wisdom.
- “sciō quam soleās esse occupātus ” (Fam. 16.21.7) , I know how busy you usually are (are wont to be).
- brovis esse labōrō, obscūrus fīō; (Hor. A. P. 25), I struggle to be brief, I become obscure.