| Simple | Progressive | Perfect | Progressive |
| Present |
| I deteriorate |
| you deteriorate |
| he/she/it deteriorates |
| we deteriorate |
| you all deteriorate |
| they deteriorate |
|
| I am deteriorating |
| you are deteriorating |
| he/she/it is deteriorating |
| we are deteriorating |
| you all are deteriorating |
| they are deteriorating |
|
| I have deteriorated |
| you have deteriorated |
| he/she/it has deteriorated |
| we have deteriorated |
| you all have deteriorated |
| they have deteriorated |
|
| I have been deteriorating |
| you have been deteriorating |
| he/she/it has been deteriorating |
| we have been deteriorating |
| you all have been deteriorating |
| they have been deteriorating |
|
| Past |
| I deteriorated |
| you deteriorated |
| he/she/it deteriorated |
| we deteriorated |
| you all deteriorated |
| they deteriorated |
|
| I was deteriorating |
| you were deteriorating |
| he/she/it was deteriorating |
| we were deteriorating |
| you all were deteriorating |
| they were deteriorating |
|
| I had deteriorated |
| you had deteriorated |
| he/she/it had deteriorated |
| we had deteriorated |
| you all had deteriorated |
| they had deteriorated |
|
| I had been deteriorating |
| you had been deteriorating |
| he/she/it had been deteriorating |
| we had been deteriorating |
| you all had been deteriorating |
| they had been deteriorating |
|
| Future |
| I will deteriorate |
| you will deteriorate |
| he/she/it will deteriorate |
| we will deteriorate |
| you all will deteriorate |
| they will deteriorate |
|
| I will be deteriorating |
| you will be deteriorating |
| he/she/it will be deteriorating |
| we are deteriorating |
| you all will be deteriorating |
| they will be deteriorating |
|
| I will have deteriorated |
| you will have deteriorated |
| he/she/it will have deteriorated |
| we will have deteriorated |
| you all will have deteriorated |
| they will have deteriorated |
|
| I will have been deteriorating |
| you will have been deteriorating |
| he/she/it will have been deteriorating |
| we will have been deteriorating |
| you all will have been deteriorating |
| they will have been deteriorating |
|
