Conjugación del verbo inglés COULD PREASCERTAIN
Verbo regular: preascertain - preascertained - preascertained
Afirmación
Forma simple
I could preascertainyou could preascertain
he could preascertain
we could preascertain
you could preascertain
they could preascertain
Forma con V-ing
I could be preascertainingyou could be preascertaining
he could be preascertaining
we could be preascertaining
you could be preascertaining
they could be preascertaining
Perfecto
I could have preascertainedyou could have preascertained
he could have preascertained
we could have preascertained
you could have preascertained
they could have preascertained
Perfecto con V-ing
I could have been preascertainingyou could have been preascertaining
he could have been preascertaining
we could have been preascertaining
you could have been preascertaining
they could have been preascertaining
Negación
Forma simple
I couldn't preascertainyou couldn't preascertain
he couldn't preascertain
we couldn't preascertain
you couldn't preascertain
they couldn't preascertain
Forma con V-ing
I couldn't be preascertainingyou couldn't be preascertaining
he couldn't be preascertaining
we couldn't be preascertaining
you couldn't be preascertaining
they couldn't be preascertaining
Perfecto
I couldn't have preascertainedyou couldn't have preascertained
he couldn't have preascertained
we couldn't have preascertained
you couldn't have preascertained
they couldn't have preascertained
Perfecto con V-ing
I couldn't have been preascertainingyou couldn't have been preascertaining
he couldn't have been preascertaining
we couldn't have been preascertaining
you couldn't have been preascertaining
they couldn't have been preascertaining
Forma interrogativa
Forma simple
could I preascertain?could you preascertain?
could he preascertain?
could we preascertain?
could you preascertain?
could they preascertain?
Forma con V-ing
could I be preascertaining?could you be preascertaining?
could he be preascertaining?
could we be preascertaining?
could you be preascertaining?
could they be preascertaining?
Perfecto
could I have preascertained?could you have preascertained?
could he have preascertained?
could we have preascertained?
could you have preascertained?
could they have preascertained?
Perfecto con V-ing
could I have been preascertaining?could you have been preascertaining?
could he have been preascertaining?
could we have been preascertaining?
could you have been preascertaining?
could they have been preascertaining?
Forma interro-negativa
Forma simple
couldn't I preascertain?couldn't you preascertain?
couldn't he preascertain?
couldn't we preascertain?
couldn't you preascertain?
couldn't they preascertain?
Forma con V-ing
couldn't I be preascertaining?couldn't you be preascertaining?
couldn't he be preascertaining?
couldn't we be preascertaining?
couldn't you be preascertaining?
couldn't they be preascertaining?
Perfecto
couldn't I have preascertained?couldn't you have preascertained?
couldn't he have preascertained?
couldn't we have preascertained?
couldn't you have preascertained?
couldn't they have preascertained?
Perfecto con V-ing
couldn't I have been preascertaining?couldn't you have been preascertaining?
couldn't he have been preascertaining?
couldn't we have been preascertaining?
couldn't you have been preascertaining?
couldn't they have been preascertaining?