| I | whistle | 
|---|---|
| you | whistle | 
| he/she/it | whistles | 
| we | whistle | 
| you | whistle | 
| they | whistle | 
| I | whistled | 
|---|---|
| you | whistled | 
| he/she/it | whistled | 
| we | whistled | 
| you | whistled | 
| they | whistled | 
| I | have | whistled | 
|---|---|---|
| you | have | whistled | 
| he/she/it | has | whistled | 
| we | have | whistled | 
| you | have | whistled | 
| they | have | whistled | 
| I | had | whistled | 
|---|---|---|
| you | had | whistled | 
| he/she/it | had | whistled | 
| we | had | whistled | 
| you | had | whistled | 
| they | had | whistled | 
