English Grammar: Present Perfect Tense - Structure and Examples

Affirmative: Subject + have/has + past participle Have you seen an elephant?

Negative: Subject + haven't/hasn't + past participle You haven't seen an elephant.

Interrogative: Have/Has + subject + past participle + ? Have you seen an elephant?

Affirmative Short Answer: Yes, pronoun + have/has. Yes, I have.

Negative Short Answer: No, pronoun + haven't/hasn't. No, I haven't.