English Verb - To Demonstrate Infinitive - to demonstrate Present participle - demonstrating Past participle - demonstrated 1. Present Tense Singular I demonstrate You demonstrate 7 He/she/it demonstrates Plural We demonstrate You demonstrate They demonstrate 2. Present Progressive Tense Singular I am demonstrating You are demonstrating He/she/it is demonstrating Plural We are demonstrating You are demonstrating They are demonstrating 3. Past Tense Singular I demonstrated You demonstrated He/she/it demonstrated Plural We demonstrated You demonstrated They demonstrated 4. Present Perfect Tense Singular I have demonstrated You have demonstrated He/she/it has demonstrated Plural We have demonstrated You have demonstrated They have demonstrated 5. Present Perfect Progressive Tense Singular I have been demonstrating You have been demonstrating He/she/it has been demonstrating Plural We have been demonstrating You have been demonstrating They have been demonstrating 6. Past Progressive Tense Singular I was demonstrating You were demonstrating He/she/it was demonstrating Plural We were demonstrating You were demonstrating They were demonstrating 7. Past Perfect Tense Singular I had demonstrated You had demonstrated He/she/it had demonstrated Plural We had demonstrated You had demonstrated They had demonstrated 8. Past Perfect Progressive Tense Singular I had been demonstrating You had been demonstrating He/she/it had been demonstrating Plural We had been demonstrating You had been demonstrating They had been demonstrating 9. Future Tense Singular I will demonstrate You will demonstrate He/she/it will demonstrate Plural We will demonstrate You will demonstrate They will demonstrate 10. Future Progressive Tense Singular I will be demonstrating You will be demonstrating He/she/it will be demonstrating Plural We will be demonstrating You will be demonstrating They will be demonstrating 11. Future Perfect Tense Singular I will have demonstrated You will have demonstrated He/she/it will have demonstrated Plural We will have demonstrated You will have demonstrated They will have demonstrated 12. Future Perfect Progressive Tense Singular I will have been demonstrating You will have been demonstrating He/she/it will have been demonstrating Plural We will have been demonstrating You will have been demonstrating They will have been demonstrating