to understand
Irregular verb: understand - understood- understood

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 do I not understand?
do you not understand?
doesshe not understand?
do we not understand?
do you not understand?
do they not understand? 	amI not understanding?
areyou not understanding?
isshe not understanding?
arewe not understanding?
areyou not understanding?
arethey not understanding? 	did I not understand?
did you not understand?
did she not understand?
did we not understand?
did you not understand?
did they not understand? 	wasI not understanding?
wereyou not understanding?
wasshe not understanding?
werewe not understanding?
wereyou not understanding?
werethey not understanding? 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
 have I not understood?
have you not understood?
hasshe not understood?
have we not understood?
have you not understood?
have they not understood? 	 have I not been understanding?
have you not been understanding?
hasshe not been understanding?
have we not been understanding?
have you not been understanding?
have they not been understanding? 	had I not understood?
had you not understood?
had she not understood?
had we not understood?
had you not understood?
had they not understood? 	had I not been understanding?
had you not been understanding?
had she not been understanding?
had we not been understanding?
had you not been understanding?
had they not been understanding? 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
will I not understand?
will you not understand?
will she not understand?
will we not understand?
will you not understand?
will they not understand? 	will I not be understanding?
will you not be understanding?
will she not be understanding?
will we not be understanding?
will you not be understanding?
will they not be understanding? 	will I not have understood?
will you not have understood?
will she not have understood?
will we not have understood?
will you not have understood?
will they not have understood? 	will I not have been understanding?
will you not have been understanding?
will she not have been understanding?
will we not have been understanding?
will you not have been understanding?
will they not have been understanding? 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
would I not understand?
would you not understand?
would she not understand?
would we not understand?
would you not understand?
would they not understand? 	would I not be understanding?
would you not be understanding?
would she not be understanding?
would we not be understanding?
would you not be understanding?
would they not be understanding? 	would I not have understood?
would you not have understood?
would she not have understood?
would we not have understood?
would you not have understood?
would they not have understood? 	would I not have been understanding?
would you not have been understanding?
would she not have been understanding?
would we not have been understanding?
would you not have been understanding?
would they not have been understanding? 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to understand 	 	-
-
- 	 	

Participle 	
Present 	Past 	 	 	
understanding	understood