प्रेजेंट परफेक्ट के फार्मूला- सकारात्मक वाक्य [Subject + have / has + V3 + object], नकारात्मक वाक्य [Subject + have / has + not + V3 + object], प्रश्नवाचक वाक्य [ Wh word / Have / Has + subject + V3 + object] प्रश्नवाचक नकारात्मक [ Wh word / Have / Has + not + subject + V3 + object]