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? 	amI 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