
Verbo regular: concern - concerned - concerned
| Presente | Presente continuo | Pretérito | Pretérito continuo | 
| I concern you concern he concerns we concern you concern they concern | I am concerning you are concerning he is concerning we are concerning you are concerning they are concerning | I concerned you concerned he concerned we concerned you concerned they concerned | I was concerning you were concerning he was concerning we were concerning you were concerning they were concerning | 
| Presente perfecto | Presente perfecto continuo | Pluscuamperfecto | Pluscuamperfecto continuo | 
| I have concerned you have concerned he has concerned we have concerned you have concerned they have concerned | I have been concerning you have been concerning he has been concerning we have been concerning you have been concerning they have been concerning | I had concerned you had concerned he had concerned we had concerned you had concerned they had concerned | I had been concerning you had been concerning he had been concerning we had been concerning you had been concerning they had been concerning | 
| Futuro simple | Futuro continuo | Futuro perfecto | Futuro perfecto contínuo | 
| I will concern you will concern he will concern we will concern you will concern they will concern | I will be concerning you will be concerning he will be concerning we will be concerning you will be concerning they will be concerning | I will have concerned you will have concerned he will have concerned we will have concerned you will have concerned they will have concerned | I will have been concerning you will have been concerning he will have been concerning we will have been concerning you will have been concerning they will have been concerning | 
| Presente | Presente continuo | Passado | Passado continuo | 
| I would concern you would concern he would concern we would concern you would concern they would concern | I would be concerning you would be concerning he would be concerning we would be concerning you would be concerning they would be concerning | I would have concerned you would have concerned he would have concerned we would have concerned you would have concerned they would have concerned | I would have been concerning you would have been concerning he would have been concerning we would have been concerning you would have been concerning they would have been concerning | 
| Infinitivo | Imperativo | 
| Infinitivo | Imperativo | ||
| to concern | concern Let's concern concern | 
| Presente | Passado | ||
| concerning | concerned |