Conjugação do verbo inglês COULD ASCERTAIN

Verbo regular: ascertain - ascertained - ascertained

Afirmação

Forma simple

I could ascertain
you could ascertain
he could ascertain
we could ascertain
you could ascertain
they could ascertain

Forma com V-ing

I could be ascertaining
you could be ascertaining
he could be ascertaining
we could be ascertaining
you could be ascertaining
they could be ascertaining

Perfeito

I could have ascertained
you could have ascertained
he could have ascertained
we could have ascertained
you could have ascertained
they could have ascertained

Perfeito com V-ing

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

Negação

Forma simple

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

Forma com V-ing

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

Perfeito

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

Perfeito com V-ing

I couldn't have been ascertaining
you couldn't have been ascertaining
he 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 he ascertain?
could we ascertain?
could you ascertain?
could they ascertain?

Forma com V-ing

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

Perfeito

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

Perfeito com V-ing

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

Forma interro-Negação

Forma simple

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

Forma com V-ing

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

Perfeito

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

Perfeito com V-ing

couldn't I have been ascertaining?
couldn't you have been ascertaining?
couldn't he 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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