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