Object vs. Complement: Key Grammar Differences Explained
Object is the noun phrase that receives the verb’s action; Complement is the word or phrase that completes the meaning of the subject or object.
People trip up because both come after the verb and sound like “answers.” A quick test: if you can turn it into “It is …” and it still makes sense, it’s a Complement, not an Object.
Key Differences
Objects answer “what/whom” after an action verb (She kicked the ball). Complements answer “what/who” after linking verbs (She is the coach). Objects are acted upon; Complements rename or describe.
Which One Should You Choose?
Use an Object when the verb shows action. Use a Complement after linking verbs like be, become, seem. Swap them and the sentence breaks: *“She kicked the coach” vs. “She is the coach.”
Examples and Daily Life
Texting: “I called Mom” (Object—Mom gets the call). Caption: “This is Mom” (Complement—Mom renames subject). Mixing them confuses Siri and your readers alike.
Can a single word be both?
Yes. In “I painted the wall green,” wall is the Object and green is the Object Complement describing the wall.
What if the verb is “consider”?
“Consider” takes an Object plus Object Complement: “They elected her CEO.” Her is the Object; CEO is the Complement renaming her.