| I | function | 
|---|---|
| you | function | 
| he/she/it | functions | 
| we | function | 
| you | function | 
| they | function | 
| I | functioned | 
|---|---|
| you | functioned | 
| he/she/it | functioned | 
| we | functioned | 
| you | functioned | 
| they | functioned | 
| I | have | functioned | 
|---|---|---|
| you | have | functioned | 
| he/she/it | has | functioned | 
| we | have | functioned | 
| you | have | functioned | 
| they | have | functioned | 
| I | had | functioned | 
|---|---|---|
| you | had | functioned | 
| he/she/it | had | functioned | 
| we | had | functioned | 
| you | had | functioned | 
| they | had | functioned | 
