To find out definitely; to discover or establish.
Infinitiveascertain
Past simpleascertained
Past participleascertained
-ing formascertaining
Full conjugation of the English verb to ascertain (past simple ascertained,
past participle ascertained):
present simple and continuous, past simple and continuous, present perfect, past perfect,
future, conditional, subjunctive and imperative, with all persons.
Indicative
Present simple
I
ascertain
you
ascertain
he/she/it
ascertains
we
ascertain
you
ascertain
they
ascertain
Present continuous
I
am ascertaining
you
are ascertaining
he/she/it
is ascertaining
we
are ascertaining
you
are ascertaining
they
are ascertaining
Present perfect
I
have ascertained
you
have ascertained
he/she/it
has ascertained
we
have ascertained
you
have ascertained
they
have ascertained
Present perfect continuous
I
have been ascertaining
you
have been ascertaining
he/she/it
has been ascertaining
we
have been ascertaining
you
have been ascertaining
they
have been ascertaining
Past simple
I
ascertained
you
ascertained
he/she/it
ascertained
we
ascertained
you
ascertained
they
ascertained
Past continuous
I
was ascertaining
you
were ascertaining
he/she/it
was ascertaining
we
were ascertaining
you
were ascertaining
they
were ascertaining
Past perfect
I
had ascertained
you
had ascertained
he/she/it
had ascertained
we
had ascertained
you
had ascertained
they
had ascertained
Past perfect continuous
I
had been ascertaining
you
had been ascertaining
he/she/it
had been ascertaining
we
had been ascertaining
you
had been ascertaining
they
had been ascertaining
Future simple
I
will ascertain
you
will ascertain
he/she/it
will ascertain
we
will ascertain
you
will ascertain
they
will ascertain
Future continuous
I
will be ascertaining
you
will be ascertaining
he/she/it
will be ascertaining
we
will be ascertaining
you
will be ascertaining
they
will be ascertaining
Future perfect
I
will have ascertained
you
will have ascertained
he/she/it
will have ascertained
we
will have ascertained
you
will have ascertained
they
will have ascertained
Future perfect continuous
I
will have been ascertaining
you
will have been ascertaining
he/she/it
will have been ascertaining
we
will have been ascertaining
you
will have been ascertaining
they
will have been ascertaining
Conditional
Present
I
would ascertain
you
would ascertain
he/she/it
would ascertain
we
would ascertain
you
would ascertain
they
would ascertain
Present continuous
I
would be ascertaining
you
would be ascertaining
he/she/it
would be ascertaining
we
would be ascertaining
you
would be ascertaining
they
would be ascertaining
Perfect
I
would have ascertained
you
would have ascertained
he/she/it
would have ascertained
we
would have ascertained
you
would have ascertained
they
would have ascertained
Perfect continuous
I
would have been ascertaining
you
would have been ascertaining
he/she/it
would have been ascertaining
we
would have been ascertaining
you
would have been ascertaining
they
would have been ascertaining
Subjunctive
Present
that I
ascertain
that you
ascertain
that he/she/it
ascertain
that we
ascertain
that you
ascertain
that they
ascertain
Past
if I
ascertained
if you
ascertained
if he/she/it
ascertained
if we
ascertained
if you
ascertained
if they
ascertained
Imperative
Affirmative
you
ascertain
we
let's ascertain
Negative
you
don't ascertain
we
let's not ascertain
Non-finite forms
Infinitive
to ascertain
Perfect infinitive
to have ascertained
Present participle / gerund
ascertaining
Past participle
ascertained
Conjugations: Wiktionary (via kaikki.org), adapted, licensed under CC BY-SA 4.0.