Both the direct object and the predicate nominative are classed as complements, because they are used to complete the sense of the predicate verb ([§ 483]).
103. A verb of asking sometimes takes two direct objects, one denoting the person and the other the thing.
- She asked the boy his name.
- Ask me no favors.
- I asked the lawyer his opinion.
2. Predicate Objective
104. Verbs of choosing, calling, naming, making, and thinking may take two objects referring to the same person or thing.
The first of these is the direct object, and the second, which completes the sense of the predicate, is called a predicate objective.
- We chose Oscar president. [Oscar is the direct object of chose; president is the predicate objective.]
- I call John my friend.
- They thought the man a coward.
- Make my house your home.
The predicate objective is often called the complementary object or the objective attribute. It is classed as a complement.
An adjective may serve as predicate objective.
- I call this ship unseaworthy.
- Your letter made your sister anxious.
- What makes Edwin so careless?