| I | improvise | 
|---|---|
| you | improvise | 
| he/she/it | improvises | 
| we | improvise | 
| you | improvise | 
| they | improvise | 
| I | improvised | 
|---|---|
| you | improvised | 
| he/she/it | improvised | 
| we | improvised | 
| you | improvised | 
| they | improvised | 
| I | have | improvised | 
|---|---|---|
| you | have | improvised | 
| he/she/it | has | improvised | 
| we | have | improvised | 
| you | have | improvised | 
| they | have | improvised | 
| I | had | improvised | 
|---|---|---|
| you | had | improvised | 
| he/she/it | had | improvised | 
| we | had | improvised | 
| you | had | improvised | 
| they | had | improvised | 
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