must whisper
Regular verb: whisper - whispered- whispered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must whisper
you must whisper
she must whisper
we must whisper
you must whisper
they must whisper 	I must be whispering
you must be whispering
she must be whispering
we must be whispering
you must be whispering
they must be whispering	I must have whispered
you must have whispered
she must have whispered
we must have whispered
you must have whispered
they must have whispered	I must have been whispering
you must have been whispering
she must have been whispering
we must have been whispering
you must have been whispering
they must have been whispering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't whisper
you mustn't whisper
she mustn't whisper
we mustn't whisper
you mustn't whisper
they mustn't whisper 	I mustn't be whispering
you mustn't be whispering
she mustn't be whispering
we mustn't be whispering
you mustn't be whispering
they mustn't be whispering	I mustn't have whispered
you mustn't have whispered
she mustn't have whispered
we mustn't have whispered
you mustn't have whispered
they mustn't have whispered	I mustn't have been whispering
you mustn't have been whispering
she mustn't have been whispering
we mustn't have been whispering
you mustn't have been whispering
they mustn't have been whispering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I whisper?
must you whisper?
must she whisper?
must we whisper?
must you whisper?
must they whisper? 	must I be whispering?
must you be whispering?
must she be whispering?
must we be whispering?
must you be whispering?
must they be whispering? 	must I have whispered?
must you have whispered?
must she have whispered?
must we have whispered?
must you have whispered?
must they have whispered? 	must I have been whispering?
must you have been whispering?
must she have been whispering?
must we have been whispering?
must you have been whispering?
must they have been whispering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I whisper?
mustn't you whisper?
mustn't she whisper?
mustn't we whisper?
mustn't you whisper?
mustn't they whisper? 	mustn't I be whispering?
mustn't you be whispering?
mustn't she be whispering?
mustn't we be whispering?
mustn't you be whispering?
mustn't they be whispering? 	mustn't I have whispered?
mustn't you have whispered?
mustn't she have whispered?
mustn't we have whispered?
mustn't you have whispered?
mustn't they have whispered? 	mustn't I have been whispering?
mustn't you have been whispering?
mustn't she have been whispering?
mustn't we have been whispering?
mustn't you have been whispering?
mustn't they have been whispering?