| Simple | Progressive | Perfect | Progressive |
| Present |
| I sicken |
| you sicken |
| he/she/it sickens |
| we sicken |
| you all sicken |
| they sicken |
|
| I am sickening |
| you are sickening |
| he/she/it is sickening |
| we are sickening |
| you all are sickening |
| they are sickening |
|
| I have sickened |
| you have sickened |
| he/she/it has sickened |
| we have sickened |
| you all have sickened |
| they have sickened |
|
| I have been sickening |
| you have been sickening |
| he/she/it has been sickening |
| we have been sickening |
| you all have been sickening |
| they have been sickening |
|
| Past |
| I sickened |
| you sickened |
| he/she/it sickened |
| we sickened |
| you all sickened |
| they sickened |
|
| I was sickening |
| you were sickening |
| he/she/it was sickening |
| we were sickening |
| you all were sickening |
| they were sickening |
|
| I had sickened |
| you had sickened |
| he/she/it had sickened |
| we had sickened |
| you all had sickened |
| they had sickened |
|
| I had been sickening |
| you had been sickening |
| he/she/it had been sickening |
| we had been sickening |
| you all had been sickening |
| they had been sickening |
|
| Future |
| I will sicken |
| you will sicken |
| he/she/it will sicken |
| we will sicken |
| you all will sicken |
| they will sicken |
|
| I will be sickening |
| you will be sickening |
| he/she/it will be sickening |
| we are sickening |
| you all will be sickening |
| they will be sickening |
|
| I will have sickened |
| you will have sickened |
| he/she/it will have sickened |
| we will have sickened |
| you all will have sickened |
| they will have sickened |
|
| I will have been sickening |
| you will have been sickening |
| he/she/it will have been sickening |
| we will have been sickening |
| you all will have been sickening |
| they will have been sickening |
|
