| Simple | Progressive | Perfect | Progressive |
| Present |
| I tamper |
| you tamper |
| he/she/it tampers |
| we tamper |
| you all tamper |
| they tamper |
|
| I am tampering |
| you are tampering |
| he/she/it is tampering |
| we are tampering |
| you all are tampering |
| they are tampering |
|
| I have tampered |
| you have tampered |
| he/she/it has tampered |
| we have tampered |
| you all have tampered |
| they have tampered |
|
| I have been tampering |
| you have been tampering |
| he/she/it has been tampering |
| we have been tampering |
| you all have been tampering |
| they have been tampering |
|
| Past |
| I tampered |
| you tampered |
| he/she/it tampered |
| we tampered |
| you all tampered |
| they tampered |
|
| I was tampering |
| you were tampering |
| he/she/it was tampering |
| we were tampering |
| you all were tampering |
| they were tampering |
|
| I had tampered |
| you had tampered |
| he/she/it had tampered |
| we had tampered |
| you all had tampered |
| they had tampered |
|
| I had been tampering |
| you had been tampering |
| he/she/it had been tampering |
| we had been tampering |
| you all had been tampering |
| they had been tampering |
|
| Future |
| I will tamper |
| you will tamper |
| he/she/it will tamper |
| we will tamper |
| you all will tamper |
| they will tamper |
|
| I will be tampering |
| you will be tampering |
| he/she/it will be tampering |
| we are tampering |
| you all will be tampering |
| they will be tampering |
|
| I will have tampered |
| you will have tampered |
| he/she/it will have tampered |
| we will have tampered |
| you all will have tampered |
| they will have tampered |
|
| I will have been tampering |
| you will have been tampering |
| he/she/it will have been tampering |
| we will have been tampering |
| you all will have been tampering |
| they will have been tampering |
|
