| I | double back | |
|---|---|---|
| you | double back | |
| he/she/it | doubles back | |
| we | double back | |
| you | double back | |
| they | double back |
| I | doubled back | |
|---|---|---|
| you | doubled back | |
| he/she/it | doubled back | |
| we | doubled back | |
| you | doubled back | |
| they | doubled back |
| I | have | doubled back | |
|---|---|---|---|
| you | have | doubled back | |
| he/she/it | has | doubled back | |
| we | have | doubled back | |
| you | have | doubled back | |
| they | have | doubled back |
| I | had | doubled back | |
|---|---|---|---|
| you | had | doubled back | |
| he/she/it | had | doubled back | |
| we | had | doubled back | |
| you | had | doubled back | |
| they | had | doubled back |