| Present "fumble" | I | fumble | |
| Present Continuous "fumble" | I | am fumbling | |
| Simple past "fumble" | I | fumbled | |
| Past Continuous "fumble" | I | was fumbling | |
| Present perfect "fumble" | I | have fumbled | |
| Present perfect continuous "fumble" | I | have been fumbling | |
| Past perfect "fumble" | I | had fumbled | |
| Past perfect continuous "fumble" | I | had been fumbling | |
| Future "fumble" | I | will fumble | |
| Future continuous "fumble" | I | will be fumbling | |
| Future perfect "fumble" | I | will have fumbled | |
| Future perfect continuous "fumble" | I | will have been fumbling |