Conjugación del verbo inglés COULD ASCERTAIN

Verbo regular: ascertain - ascertained - ascertained

Afirmación

Forma simple

I could ascertain
you could ascertain
she could ascertain
we could ascertain
you could ascertain
they could ascertain

Forma con V-ing

I could be ascertaining
you could be ascertaining
she could be ascertaining
we could be ascertaining
you could be ascertaining
they could be ascertaining

Perfecto

I could have ascertained
you could have ascertained
she could have ascertained
we could have ascertained
you could have ascertained
they could have ascertained

Perfecto con V-ing

I could have been ascertaining
you could have been ascertaining
she could have been ascertaining
we could have been ascertaining
you could have been ascertaining
they could have been ascertaining

Negación

Forma simple

I couldn't ascertain
you couldn't ascertain
she couldn't ascertain
we couldn't ascertain
you couldn't ascertain
they couldn't ascertain

Forma con V-ing

I couldn't be ascertaining
you couldn't be ascertaining
she couldn't be ascertaining
we couldn't be ascertaining
you couldn't be ascertaining
they couldn't be ascertaining

Perfecto

I couldn't have ascertained
you couldn't have ascertained
she couldn't have ascertained
we couldn't have ascertained
you couldn't have ascertained
they couldn't have ascertained

Perfecto con V-ing

I couldn't have been ascertaining
you couldn't have been ascertaining
she couldn't have been ascertaining
we couldn't have been ascertaining
you couldn't have been ascertaining
they couldn't have been ascertaining

Forma interrogativa

Forma simple

could I ascertain?
could you ascertain?
could she ascertain?
could we ascertain?
could you ascertain?
could they ascertain?

Forma con V-ing

could I be ascertaining?
could you be ascertaining?
could she be ascertaining?
could we be ascertaining?
could you be ascertaining?
could they be ascertaining?

Perfecto

could I have ascertained?
could you have ascertained?
could she have ascertained?
could we have ascertained?
could you have ascertained?
could they have ascertained?

Perfecto con V-ing

could I have been ascertaining?
could you have been ascertaining?
could she have been ascertaining?
could we have been ascertaining?
could you have been ascertaining?
could they have been ascertaining?

Forma interro-negativa

Forma simple

couldn't I ascertain?
couldn't you ascertain?
couldn't she ascertain?
couldn't we ascertain?
couldn't you ascertain?
couldn't they ascertain?

Forma con V-ing

couldn't I be ascertaining?
couldn't you be ascertaining?
couldn't she be ascertaining?
couldn't we be ascertaining?
couldn't you be ascertaining?
couldn't they be ascertaining?

Perfecto

couldn't I have ascertained?
couldn't you have ascertained?
couldn't she have ascertained?
couldn't we have ascertained?
couldn't you have ascertained?
couldn't they have ascertained?

Perfecto con V-ing

couldn't I have been ascertaining?
couldn't you have been ascertaining?
couldn't she have been ascertaining?
couldn't we have been ascertaining?
couldn't you have been ascertaining?
couldn't they have been ascertaining?

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