
Verbo irregular: understand - understood - understood
| Presente | Presente continuo | Pretérito | Pretérito continuo | 
| I understand you understand he understands we understand you understand they understand | I am understanding you are understanding he is understanding we are understanding you are understanding they are understanding | I understood you understood he understood we understood you understood they understood | I was understanding you were understanding he was understanding we were understanding you were understanding they were understanding | 
| Presente perfecto | Presente perfecto continuo | Pluscuamperfecto | Pluscuamperfecto continuo | 
| I have understood you have understood he has understood we have understood you have understood they have understood | I have been understanding you have been understanding he has been understanding we have been understanding you have been understanding they have been understanding | I had understood you had understood he had understood we had understood you had understood they had understood | I had been understanding you had been understanding he had been understanding we had been understanding you had been understanding they had been understanding | 
| Futuro simple | Futuro continuo | Futuro perfecto | Futuro perfecto contínuo | 
| I will understand you will understand he will understand we will understand you will understand they will understand | I will be understanding you will be understanding he will be understanding we will be understanding you will be understanding they will be understanding | I will have understood you will have understood he will have understood we will have understood you will have understood they will have understood | I will have been understanding you will have been understanding he will have been understanding we will have been understanding you will have been understanding they will have been understanding | 
| Presente | Presente continuo | Passado | Passado continuo | 
| I would understand you would understand he would understand we would understand you would understand they would understand | I would be understanding you would be understanding he would be understanding we would be understanding you would be understanding they would be understanding | I would have understood you would have understood he would have understood we would have understood you would have understood they would have understood | I would have been understanding you would have been understanding he would have been understanding we would have been understanding you would have been understanding they would have been understanding | 
| Infinitivo | Imperativo | 
| Infinitivo | Imperativo | ||
| to understand | understand Let's understand understand | 
| Presente | Passado | ||
| understanding | understood |