| Simple | Progressive | Perfect | Progressive |
| Present |
| I flatten |
| you flatten |
| he/she/it flattens |
| we flatten |
| you all flatten |
| they flatten |
|
| I am flattening |
| you are flattening |
| he/she/it is flattening |
| we are flattening |
| you all are flattening |
| they are flattening |
|
| I have flattened |
| you have flattened |
| he/she/it has flattened |
| we have flattened |
| you all have flattened |
| they have flattened |
|
| I have been flattening |
| you have been flattening |
| he/she/it has been flattening |
| we have been flattening |
| you all have been flattening |
| they have been flattening |
|
| Past |
| I flattened |
| you flattened |
| he/she/it flattened |
| we flattened |
| you all flattened |
| they flattened |
|
| I was flattening |
| you were flattening |
| he/she/it was flattening |
| we were flattening |
| you all were flattening |
| they were flattening |
|
| I had flattened |
| you had flattened |
| he/she/it had flattened |
| we had flattened |
| you all had flattened |
| they had flattened |
|
| I had been flattening |
| you had been flattening |
| he/she/it had been flattening |
| we had been flattening |
| you all had been flattening |
| they had been flattening |
|
| Future |
| I will flatten |
| you will flatten |
| he/she/it will flatten |
| we will flatten |
| you all will flatten |
| they will flatten |
|
| I will be flattening |
| you will be flattening |
| he/she/it will be flattening |
| we are flattening |
| you all will be flattening |
| they will be flattening |
|
| I will have flattened |
| you will have flattened |
| he/she/it will have flattened |
| we will have flattened |
| you all will have flattened |
| they will have flattened |
|
| I will have been flattening |
| you will have been flattening |
| he/she/it will have been flattening |
| we will have been flattening |
| you all will have been flattening |
| they will have been flattening |
|
