must obtund
Regular verb: obtund - obtunded- obtunded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must obtund
you must obtund
she must obtund
we must obtund
you must obtund
they must obtund 	I must be obtunding
you must be obtunding
she must be obtunding
we must be obtunding
you must be obtunding
they must be obtunding	I must have obtunded
you must have obtunded
she must have obtunded
we must have obtunded
you must have obtunded
they must have obtunded	I must have been obtunding
you must have been obtunding
she must have been obtunding
we must have been obtunding
you must have been obtunding
they must have been obtunding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't obtund
you mustn't obtund
she mustn't obtund
we mustn't obtund
you mustn't obtund
they mustn't obtund 	I mustn't be obtunding
you mustn't be obtunding
she mustn't be obtunding
we mustn't be obtunding
you mustn't be obtunding
they mustn't be obtunding	I mustn't have obtunded
you mustn't have obtunded
she mustn't have obtunded
we mustn't have obtunded
you mustn't have obtunded
they mustn't have obtunded	I mustn't have been obtunding
you mustn't have been obtunding
she mustn't have been obtunding
we mustn't have been obtunding
you mustn't have been obtunding
they mustn't have been obtunding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I obtund?
must you obtund?
must she obtund?
must we obtund?
must you obtund?
must they obtund? 	must I be obtunding?
must you be obtunding?
must she be obtunding?
must we be obtunding?
must you be obtunding?
must they be obtunding? 	must I have obtunded?
must you have obtunded?
must she have obtunded?
must we have obtunded?
must you have obtunded?
must they have obtunded? 	must I have been obtunding?
must you have been obtunding?
must she have been obtunding?
must we have been obtunding?
must you have been obtunding?
must they have been obtunding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I obtund?
mustn't you obtund?
mustn't she obtund?
mustn't we obtund?
mustn't you obtund?
mustn't they obtund? 	mustn't I be obtunding?
mustn't you be obtunding?
mustn't she be obtunding?
mustn't we be obtunding?
mustn't you be obtunding?
mustn't they be obtunding? 	mustn't I have obtunded?
mustn't you have obtunded?
mustn't she have obtunded?
mustn't we have obtunded?
mustn't you have obtunded?
mustn't they have obtunded? 	mustn't I have been obtunding?
mustn't you have been obtunding?
mustn't she have been obtunding?
mustn't we have been obtunding?
mustn't you have been obtunding?
mustn't they have been obtunding?