| Simple | Progressive | Perfect | Progressive |
| Present |
| I decrease |
| you decrease |
| he/she/it decreases |
| we decrease |
| you all decrease |
| they decrease |
|
| I am decreasing |
| you are decreasing |
| he/she/it is decreasing |
| we are decreasing |
| you all are decreasing |
| they are decreasing |
|
| I have decreased |
| you have decreased |
| he/she/it has decreased |
| we have decreased |
| you all have decreased |
| they have decreased |
|
| I have been decreasing |
| you have been decreasing |
| he/she/it has been decreasing |
| we have been decreasing |
| you all have been decreasing |
| they have been decreasing |
|
| Past |
| I decreased |
| you decreased |
| he/she/it decreased |
| we decreased |
| you all decreased |
| they decreased |
|
| I was decreasing |
| you were decreasing |
| he/she/it was decreasing |
| we were decreasing |
| you all were decreasing |
| they were decreasing |
|
| I had decreased |
| you had decreased |
| he/she/it had decreased |
| we had decreased |
| you all had decreased |
| they had decreased |
|
| I had been decreasing |
| you had been decreasing |
| he/she/it had been decreasing |
| we had been decreasing |
| you all had been decreasing |
| they had been decreasing |
|
| Future |
| I will decrease |
| you will decrease |
| he/she/it will decrease |
| we will decrease |
| you all will decrease |
| they will decrease |
|
| I will be decreasing |
| you will be decreasing |
| he/she/it will be decreasing |
| we are decreasing |
| you all will be decreasing |
| they will be decreasing |
|
| I will have decreased |
| you will have decreased |
| he/she/it will have decreased |
| we will have decreased |
| you all will have decreased |
| they will have decreased |
|
| I will have been decreasing |
| you will have been decreasing |
| he/she/it will have been decreasing |
| we will have been decreasing |
| you all will have been decreasing |
| they will have been decreasing |
|
