Explanation:
1. **Complement**: A complement completes the meaning of the predicate. For example:
- She is a doctor. ("doctor" completes the meaning of "is")
- They seem happy. ("happy" completes the meaning of "seem")
2. **Object**: An object is a noun or pronoun that receives the action of the verb in a sentence. For example:
- She bought a book. ("book" receives the action of "bought")
- He kicked the ball. ("ball" receives the action of "kicked")
3. **Adverb**: An adverb modifies or describes a verb, adjective, or another adverb by providing additional information about time, manner, place, or degree. For example:
- She quickly ran to the store. ("quickly" modifies the verb "ran")
- They played outside yesterday. ("yesterday" modifies the verb "played" by indicating when the action took place)
