| I | must | |
|---|---|---|
| you | must | |
| he/she/it | must | |
| we | must | |
| you | must | |
| they | must |
| I | had to | |
|---|---|---|
| you | had to | |
| he/she/it | had to | |
| we | had to | |
| you | had to | |
| they | had to |
| I | have | had to | |
|---|---|---|---|
| you | have | had to | |
| he/she/it | has | had to | |
| we | have | had to | |
| you | have | had to | |
| they | have | had to |
| I | had | had to | |
|---|---|---|---|
| you | had | had to | |
| he/she/it | had | had to | |
| we | had | had to | |
| you | had | had to | |
| they | had | had to |