English verb conjugation
TO ASCERTAIN

Regular verb: ascertain - ascertained - ascertained

Indicative

Present	Present continuous	Preterite	Preterite continuous
do I ascertain? do you ascertain? does he ascertain? do we ascertain? do you ascertain? do they ascertain?	am I ascertaining? are you ascertaining? is he ascertaining? are we ascertaining? are you ascertaining? are they ascertaining?	did I ascertain? did you ascertain? did he ascertain? did we ascertain? did you ascertain? did they ascertain?	was I ascertaining? were you ascertaining? was he ascertaining? were we ascertaining? were you ascertaining? were they ascertaining?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
have I ascertained? have you ascertained? has he ascertained? have we ascertained? have you ascertained? have they ascertained?	have I been ascertaining? have you been ascertaining? has he been ascertaining? have we been ascertaining? have you been ascertaining? have they been ascertaining?	had I ascertained? had you ascertained? had he ascertained? had we ascertained? had you ascertained? had they ascertained?	had I been ascertaining? had you been ascertaining? had he been ascertaining? had we been ascertaining? had you been ascertaining? had they been ascertaining?
Future	Future continuous	Future perfect	Future perfect continuous
will I ascertain? will you ascertain? will he ascertain? will we ascertain? will you ascertain? will they ascertain?	will I be ascertaining? will you be ascertaining? will he be ascertaining? will we be ascertaining? will you be ascertaining? will they be ascertaining?	will I have ascertained? will you have ascertained? will he have ascertained? will we have ascertained? will you have ascertained? will they have ascertained?	will I have been ascertaining? will you have been ascertaining? will he have been ascertaining? will we have been ascertaining? will you have been ascertaining? will they have been ascertaining?

Conditional

Present	Present continuous	Past	Past continuous
would I ascertain? would you ascertain? would he ascertain? would we ascertain? would you ascertain? would they ascertain?	would I be ascertaining? would you be ascertaining? would he be ascertaining? would we be ascertaining? would you be ascertaining? would they be ascertaining?	would I have ascertained? would you have ascertained? would he have ascertained? would we have ascertained? would you have ascertained? would they have ascertained?	would I have been ascertaining? would you have been ascertaining? would he have been ascertaining? would we have been ascertaining? would you have been ascertaining? would they have been ascertaining?

Infinitive

Imperative

Infinitive		Imperative
to ascertain		- - -

Participle

Present	Past
ascertaining	ascertained