Verbs of incomplete predication express the idea of the state of the subject and the object. Let’s take an example.
The food has become ‘stale’.
Here if the last word ‘stale’ is removed, the sentence will not make any sense.
So the verb ‘become’ is the verb of incomplete predication. And the world ‘stale’ is called the complement of the verb. Other examples are
He looks nervous.
‘Look’ is the verb of the incomplete predication and the word ‘nervous’ is the complement. Some more examples are
They appeared convinced.
The sky becomes dark.
Complement is also of two types- Subjective and Objective.
Subjective complement is the word that describes the subject. For example
Ram is a doctor.
The earth is round.
This car is beautiful.
He looks handsome.
In the above sentences the complement-doctor, round, beautiful, handsome- describe the subjects. Hence they are the subjective complements.
Now let’s see the objective complements.
The members elected him the chairman. ( Chairman describes the object ‘him’)
The court found the accused guilty (Guilty is the complement describing the accused)
He proved the charges wrong.
Science has made our life comfortable.