must endanger
Regular verb: endanger - endangered- endangered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must endanger
you must endanger
he must endanger
we must endanger
you must endanger
they must endanger 	I must be endangering
you must be endangering
he must be endangering
we must be endangering
you must be endangering
they must be endangering	I must have endangered
you must have endangered
he must have endangered
we must have endangered
you must have endangered
they must have endangered	I must have been endangering
you must have been endangering
he must have been endangering
we must have been endangering
you must have been endangering
they must have been endangering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't endanger
you mustn't endanger
he mustn't endanger
we mustn't endanger
you mustn't endanger
they mustn't endanger 	I mustn't be endangering
you mustn't be endangering
he mustn't be endangering
we mustn't be endangering
you mustn't be endangering
they mustn't be endangering	I mustn't have endangered
you mustn't have endangered
he mustn't have endangered
we mustn't have endangered
you mustn't have endangered
they mustn't have endangered	I mustn't have been endangering
you mustn't have been endangering
he mustn't have been endangering
we mustn't have been endangering
you mustn't have been endangering
they mustn't have been endangering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I endanger?
must you endanger?
must he endanger?
must we endanger?
must you endanger?
must they endanger? 	must I be endangering?
must you be endangering?
must he be endangering?
must we be endangering?
must you be endangering?
must they be endangering? 	must I have endangered?
must you have endangered?
must he have endangered?
must we have endangered?
must you have endangered?
must they have endangered? 	must I have been endangering?
must you have been endangering?
must he have been endangering?
must we have been endangering?
must you have been endangering?
must they have been endangering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I endanger?
mustn't you endanger?
mustn't he endanger?
mustn't we endanger?
mustn't you endanger?
mustn't they endanger? 	mustn't I be endangering?
mustn't you be endangering?
mustn't he be endangering?
mustn't we be endangering?
mustn't you be endangering?
mustn't they be endangering? 	mustn't I have endangered?
mustn't you have endangered?
mustn't he have endangered?
mustn't we have endangered?
mustn't you have endangered?
mustn't they have endangered? 	mustn't I have been endangering?
mustn't you have been endangering?
mustn't he have been endangering?
mustn't we have been endangering?
mustn't you have been endangering?
mustn't they have been endangering?