| I | improve | |
|---|---|---|
| you | improve | |
| he/she/it | improves | |
| we | improve | |
| you | improve | |
| they | improve |
| I | improved | |
|---|---|---|
| you | improved | |
| he/she/it | improved | |
| we | improved | |
| you | improved | |
| they | improved |
| I | have | improved | |
|---|---|---|---|
| you | have | improved | |
| he/she/it | has | improved | |
| we | have | improved | |
| you | have | improved | |
| they | have | improved |
| I | had | improved | |
|---|---|---|---|
| you | had | improved | |
| he/she/it | had | improved | |
| we | had | improved | |
| you | had | improved | |
| they | had | improved |