| I | convulse | 
|---|---|
| you | convulse | 
| he/she/it | convulses | 
| we | convulse | 
| you | convulse | 
| they | convulse | 
| I | convulsed | 
|---|---|
| you | convulsed | 
| he/she/it | convulsed | 
| we | convulsed | 
| you | convulsed | 
| they | convulsed | 
| I | have | convulsed | 
|---|---|---|
| you | have | convulsed | 
| he/she/it | has | convulsed | 
| we | have | convulsed | 
| you | have | convulsed | 
| they | have | convulsed | 
| I | had | convulsed | 
|---|---|---|
| you | had | convulsed | 
| he/she/it | had | convulsed | 
| we | had | convulsed | 
| you | had | convulsed | 
| they | had | convulsed | 
