English verb conjugation
TO ASCERTAIN

Regular verb: ascertain - ascertained - ascertained

Indicative

Present	Present continuous	Preterite	Preterite continuous
don't I ascertain? don't you ascertain? doesn't he ascertain? don't we ascertain? don't you ascertain? don't they ascertain?	am I not ascertaining? aren't you ascertaining? isn't he ascertaining? aren't we ascertaining? aren't you ascertaining? aren't they ascertaining?	didn't I ascertain? didn't you ascertain? didn't he ascertain? didn't we ascertain? didn't you ascertain? didn't they ascertain?	wasn't I ascertaining? weren't you ascertaining? wasn't he ascertaining? weren't we ascertaining? weren't you ascertaining? weren't they ascertaining?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
haven't I ascertained? haven't you ascertained? hasn't he ascertained? haven't we ascertained? haven't you ascertained? haven't they ascertained?	haven't I been ascertaining? haven't you been ascertaining? hasn't he been ascertaining? haven't we been ascertaining? haven't you been ascertaining? haven't they been ascertaining?	hadn't I ascertained? hadn't you ascertained? hadn't he ascertained? hadn't we ascertained? hadn't you ascertained? hadn't they ascertained?	hadn't I been ascertaining? hadn't you been ascertaining? hadn't he been ascertaining? hadn't we been ascertaining? hadn't you been ascertaining? hadn't they been ascertaining?
Future	Future continuous	Future perfect	Future perfect continuous
won't I ascertain? won't you ascertain? won't he ascertain? won't we ascertain? won't you ascertain? won't they ascertain?	won't I be ascertaining? won't you be ascertaining? won't he be ascertaining? won't we be ascertaining? won't you be ascertaining? won't they be ascertaining?	won't I have ascertained? won't you have ascertained? won't he have ascertained? won't we have ascertained? won't you have ascertained? won't they have ascertained?	won't I have been ascertaining? won't you have been ascertaining? won't he have been ascertaining? won't we have been ascertaining? won't you have been ascertaining? won't they have been ascertaining?

Conditional

Present	Present continuous	Past	Past continuous
wouldn't I ascertain? wouldn't you ascertain? wouldn't he ascertain? wouldn't we ascertain? wouldn't you ascertain? wouldn't they ascertain?	wouldn't I be ascertaining? wouldn't you be ascertaining? wouldn't he be ascertaining? wouldn't we be ascertaining? wouldn't you be ascertaining? wouldn't they be ascertaining?	wouldn't I have ascertained? wouldn't you have ascertained? wouldn't he have ascertained? wouldn't we have ascertained? wouldn't you have ascertained? wouldn't they have ascertained?	wouldn't I have been ascertaining? wouldn't you have been ascertaining? wouldn't he have been ascertaining? wouldn't we have been ascertaining? wouldn't you have been ascertaining? wouldn't they have been ascertaining?

Infinitive

Imperative

Infinitive		Imperative
to ascertain		- - -

Participle

Present	Past
ascertaining	ascertained