must engender
Regular verb: engender - engendered- engendered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must engender
you must engender
she must engender
we must engender
you must engender
they must engender 	I must be engendering
you must be engendering
she must be engendering
we must be engendering
you must be engendering
they must be engendering	I must have engendered
you must have engendered
she must have engendered
we must have engendered
you must have engendered
they must have engendered	I must have been engendering
you must have been engendering
she must have been engendering
we must have been engendering
you must have been engendering
they must have been engendering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't engender
you mustn't engender
she mustn't engender
we mustn't engender
you mustn't engender
they mustn't engender 	I mustn't be engendering
you mustn't be engendering
she mustn't be engendering
we mustn't be engendering
you mustn't be engendering
they mustn't be engendering	I mustn't have engendered
you mustn't have engendered
she mustn't have engendered
we mustn't have engendered
you mustn't have engendered
they mustn't have engendered	I mustn't have been engendering
you mustn't have been engendering
she mustn't have been engendering
we mustn't have been engendering
you mustn't have been engendering
they mustn't have been engendering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I engender?
must you engender?
must she engender?
must we engender?
must you engender?
must they engender? 	must I be engendering?
must you be engendering?
must she be engendering?
must we be engendering?
must you be engendering?
must they be engendering? 	must I have engendered?
must you have engendered?
must she have engendered?
must we have engendered?
must you have engendered?
must they have engendered? 	must I have been engendering?
must you have been engendering?
must she have been engendering?
must we have been engendering?
must you have been engendering?
must they have been engendering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I engender?
mustn't you engender?
mustn't she engender?
mustn't we engender?
mustn't you engender?
mustn't they engender? 	mustn't I be engendering?
mustn't you be engendering?
mustn't she be engendering?
mustn't we be engendering?
mustn't you be engendering?
mustn't they be engendering? 	mustn't I have engendered?
mustn't you have engendered?
mustn't she have engendered?
mustn't we have engendered?
mustn't you have engendered?
mustn't they have engendered? 	mustn't I have been engendering?
mustn't you have been engendering?
mustn't she have been engendering?
mustn't we have been engendering?
mustn't you have been engendering?
mustn't they have been engendering?