| I | purchase | 
|---|---|
| you | purchase | 
| he/she/it | purchases | 
| we | purchase | 
| you | purchase | 
| they | purchase | 
| I | purchased | 
|---|---|
| you | purchased | 
| he/she/it | purchased | 
| we | purchased | 
| you | purchased | 
| they | purchased | 
| I | have | purchased | 
|---|---|---|
| you | have | purchased | 
| he/she/it | has | purchased | 
| we | have | purchased | 
| you | have | purchased | 
| they | have | purchased | 
| I | had | purchased | 
|---|---|---|
| you | had | purchased | 
| he/she/it | had | purchased | 
| we | had | purchased | 
| you | had | purchased | 
| they | had | purchased | 
