| Simple | Progressive | Perfect | Progressive |
| Present |
| I stimulate |
| you stimulate |
| he/she/it stimulates |
| we stimulate |
| you all stimulate |
| they stimulate |
|
| I am stimulating |
| you are stimulating |
| he/she/it is stimulating |
| we are stimulating |
| you all are stimulating |
| they are stimulating |
|
| I have stimulated |
| you have stimulated |
| he/she/it has stimulated |
| we have stimulated |
| you all have stimulated |
| they have stimulated |
|
| I have been stimulating |
| you have been stimulating |
| he/she/it has been stimulating |
| we have been stimulating |
| you all have been stimulating |
| they have been stimulating |
|
| Past |
| I stimulated |
| you stimulated |
| he/she/it stimulated |
| we stimulated |
| you all stimulated |
| they stimulated |
|
| I was stimulating |
| you were stimulating |
| he/she/it was stimulating |
| we were stimulating |
| you all were stimulating |
| they were stimulating |
|
| I had stimulated |
| you had stimulated |
| he/she/it had stimulated |
| we had stimulated |
| you all had stimulated |
| they had stimulated |
|
| I had been stimulating |
| you had been stimulating |
| he/she/it had been stimulating |
| we had been stimulating |
| you all had been stimulating |
| they had been stimulating |
|
| Future |
| I will stimulate |
| you will stimulate |
| he/she/it will stimulate |
| we will stimulate |
| you all will stimulate |
| they will stimulate |
|
| I will be stimulating |
| you will be stimulating |
| he/she/it will be stimulating |
| we are stimulating |
| you all will be stimulating |
| they will be stimulating |
|
| I will have stimulated |
| you will have stimulated |
| he/she/it will have stimulated |
| we will have stimulated |
| you all will have stimulated |
| they will have stimulated |
|
| I will have been stimulating |
| you will have been stimulating |
| he/she/it will have been stimulating |
| we will have been stimulating |
| you all will have been stimulating |
| they will have been stimulating |
|
