English verb conjugation COULD PREASCERTAIN

Regular verb: preascertain - preascertained - preascertained

Affirmation

Simple form

I could preascertain
you could preascertain
he could preascertain
we could preascertain
you could preascertain
they could preascertain

V-ing form

I could be preascertaining
you could be preascertaining
he could be preascertaining
we could be preascertaining
you could be preascertaining
they could be preascertaining

Perfect

I could have preascertained
you could have preascertained
he could have preascertained
we could have preascertained
you could have preascertained
they could have preascertained

V-ing perfect

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

Negation

Simple form

I could not preascertain
you could not preascertain
he could not preascertain
we could not preascertain
you could not preascertain
they could not preascertain

V-ing form

I could not be preascertaining
you could not be preascertaining
he could not be preascertaining
we could not be preascertaining
you could not be preascertaining
they could not be preascertaining

Perfect

I could not have preascertained
you could not have preascertained
he could not have preascertained
we could not have preascertained
you could not have preascertained
they could not have preascertained

V-ing perfect

I could not have been preascertaining
you could not have been preascertaining
he could not have been preascertaining
we could not have been preascertaining
you could not have been preascertaining
they could not have been preascertaining

Interrogative form

Simple form

could I preascertain?
could you preascertain?
could he preascertain?
could we preascertain?
could you preascertain?
could they preascertain?

V-ing form

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

Perfect

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

V-ing perfect

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?

Interro-negative form

Simple form

could I not preascertain?
could you not preascertain?
could he not preascertain?
could we not preascertain?
could you not preascertain?
could they not preascertain?

V-ing form

could I not be preascertaining?
could you not be preascertaining?
could he not be preascertaining?
could we not be preascertaining?
could you not be preascertaining?
could they not be preascertaining?

Perfect

could I not have preascertained?
could you not have preascertained?
could he not have preascertained?
could we not have preascertained?
could you not have preascertained?
could they not have preascertained?

V-ing perfect

could I not have been preascertaining?
could you not have been preascertaining?
could he not have been preascertaining?
could we not have been preascertaining?
could you not have been preascertaining?
could they not have been preascertaining?

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