I concern you concern he concerns we concern you concern they concern
Presente continuo
I am concerning you are concerning he is concerning we are concerning you are concerning they are concerning
Pretérito
I concerned you concerned he concerned we concerned you concerned they concerned
Pretérito continuo
I was concerning you were concerning he was concerning we were concerning you were concerning they were concerning
Presente perfecto
I have concerned you have concerned he has concerned we have concerned you have concerned they have concerned
Presente perfecto continuo
I have been concerning you have been concerning he has been concerning we have been concerning you have been concerning they have been concerning
Pluscuamperfecto
I had concerned you had concerned he had concerned we had concerned you had concerned they had concerned
Pluscuamperfecto continuo
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
I will concern you will concern he will concern we will concern you will concern they will concern
Futuro continuo
I will be concerning you will be concerning he will be concerning we will be concerning you will be concerning they will be concerning
Futuro perfecto
I will have concerned you will have concerned he will have concerned we will have concerned you will have concerned they will have concerned
Futuro perfecto contínuo
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
Condicional
Presente
I would concern you would concern he would concern we would concern you would concern they would concern
Presente continuo
I would be concerning you would be concerning he would be concerning we would be concerning you would be concerning they would be concerning
Passado
I would have concerned you would have concerned he would have concerned we would have concerned you would have concerned they would have concerned
Passado continuo
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