
Verbo regolare: alter - altered - altered
| Presente | Presente continuo | Preterito | Preterite continua | 
| I alter you alter he alters we alter you alter they alter | I am altering you are altering he is altering we are altering you are altering they are altering | I altered you altered he altered we altered you altered they altered | I was altering you were altering he was altering we were altering you were altering they were altering | 
| Presente perfetto | Presente perfetto continuo | Piuccheperfetto | Piuccheperfetto continuo | 
| I have altered you have altered he has altered we have altered you have altered they have altered | I have been altering you have been altering he has been altering we have been altering you have been altering they have been altering | I had altered you had altered he had altered we had altered you had altered they had altered | I had been altering you had been altering he had been altering we had been altering you had been altering they had been altering | 
| Futuro semplice | Futuro continuo | Futuro anteriore | Futuro anteriore contínuo | 
| I will alter you will alter he will alter we will alter you will alter they will alter | I will be altering you will be altering he will be altering we will be altering you will be altering they will be altering | I will have altered you will have altered he will have altered we will have altered you will have altered they will have altered | I will have been altering you will have been altering he will have been altering we will have been altering you will have been altering they will have been altering | 
| Presente | Presente continuo | Passato | Passato continuo | 
| I would alter you would alter he would alter we would alter you would alter they would alter | I would be altering you would be altering he would be altering we would be altering you would be altering they would be altering | I would have altered you would have altered he would have altered we would have altered you would have altered they would have altered | I would have been altering you would have been altering he would have been altering we would have been altering you would have been altering they would have been altering | 
| Infinito | Imperativo | 
| Infinito | Imperativo | ||
| to alter | alter Let's alter alter | 
| Presente | Passato | ||
| altering | altered |