| Simple | Progressive | Perfect | Progressive |
| Present |
| I demonstrate |
| you demonstrate |
| he/she/it demonstrates |
| we demonstrate |
| you all demonstrate |
| they demonstrate |
|
| I am demonstrating |
| you are demonstrating |
| he/she/it is demonstrating |
| we are demonstrating |
| you all are demonstrating |
| they are demonstrating |
|
| I have demonstrated |
| you have demonstrated |
| he/she/it has demonstrated |
| we have demonstrated |
| you all have demonstrated |
| they have demonstrated |
|
| I have been demonstrating |
| you have been demonstrating |
| he/she/it has been demonstrating |
| we have been demonstrating |
| you all have been demonstrating |
| they have been demonstrating |
|
| Past |
| I demonstrated |
| you demonstrated |
| he/she/it demonstrated |
| we demonstrated |
| you all demonstrated |
| they demonstrated |
|
| I was demonstrating |
| you were demonstrating |
| he/she/it was demonstrating |
| we were demonstrating |
| you all were demonstrating |
| they were demonstrating |
|
| I had demonstrated |
| you had demonstrated |
| he/she/it had demonstrated |
| we had demonstrated |
| you all had demonstrated |
| they had demonstrated |
|
| I had been demonstrating |
| you had been demonstrating |
| he/she/it had been demonstrating |
| we had been demonstrating |
| you all had been demonstrating |
| they had been demonstrating |
|
| Future |
| I will demonstrate |
| you will demonstrate |
| he/she/it will demonstrate |
| we will demonstrate |
| you all will demonstrate |
| they will demonstrate |
|
| I will be demonstrating |
| you will be demonstrating |
| he/she/it will be demonstrating |
| we are demonstrating |
| you all will be demonstrating |
| they will be demonstrating |
|
| I will have demonstrated |
| you will have demonstrated |
| he/she/it will have demonstrated |
| we will have demonstrated |
| you all will have demonstrated |
| they will have demonstrated |
|
| I will have been demonstrating |
| you will have been demonstrating |
| he/she/it will have been demonstrating |
| we will have been demonstrating |
| you all will have been demonstrating |
| they will have been demonstrating |
|
