| I | zero in |
|---|---|
| you | zero in |
| he/she/it | zeroes in |
| we | zero in |
| you | zero in |
| they | zero in |
| I | zeroed in |
|---|---|
| you | zeroed in |
| he/she/it | zeroed in |
| we | zeroed in |
| you | zeroed in |
| they | zeroed in |
| I | have | zeroed in |
|---|---|---|
| you | have | zeroed in |
| he/she/it | has | zeroed in |
| we | have | zeroed in |
| you | have | zeroed in |
| they | have | zeroed in |
| I | had | zeroed in |
|---|---|---|
| you | had | zeroed in |
| he/she/it | had | zeroed in |
| we | had | zeroed in |
| you | had | zeroed in |
| they | had | zeroed in |