Total verb forms: 51
| Imperatives and participles |
| Present Participle | grumbling |
| Present Participle | grumbled |
| Imperative | grumble |
| Type | I | you | he/she/it | we | you | they |
| Present | grumble | grumble | grumbles | grumble | grumble | grumble |
| Past | grumbled | grumbled | grumbled | grumbled | grumbled | grumbled |
| Future | will grumble | will grumble | will grumble | will grumble | will grumble | will grumble |
| Present conditional | would grumble | would grumble | would grumble | would grumble | would grumble | would grumble |
| Past conditional | would have grumbled | would have grumbled | would have grumbled | would have grumbled | would have grumbled | would have grumbled |
| Present Perfect | have grumbled | have grumbled | has grumbled | have grumbled | have grumbled | have grumbled |
| Past Perfect | had grumbled | had grumbled | had grumbled | had grumbled | had grumbled | had grumbled |
| Future Perfect | will have grumbled | will have grumbled | will have grumbled | will have grumbled | will have grumbled | will have grumbled |
Conjugated verbs before and after grumble
