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