must simper
Regular verb: simper - simpered- simpered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must simper
you must simper
she must simper
we must simper
you must simper
they must simper 	I must be simpering
you must be simpering
she must be simpering
we must be simpering
you must be simpering
they must be simpering	I must have simpered
you must have simpered
she must have simpered
we must have simpered
you must have simpered
they must have simpered	I must have been simpering
you must have been simpering
she must have been simpering
we must have been simpering
you must have been simpering
they must have been simpering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't simper
you mustn't simper
she mustn't simper
we mustn't simper
you mustn't simper
they mustn't simper 	I mustn't be simpering
you mustn't be simpering
she mustn't be simpering
we mustn't be simpering
you mustn't be simpering
they mustn't be simpering	I mustn't have simpered
you mustn't have simpered
she mustn't have simpered
we mustn't have simpered
you mustn't have simpered
they mustn't have simpered	I mustn't have been simpering
you mustn't have been simpering
she mustn't have been simpering
we mustn't have been simpering
you mustn't have been simpering
they mustn't have been simpering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I simper?
must you simper?
must she simper?
must we simper?
must you simper?
must they simper? 	must I be simpering?
must you be simpering?
must she be simpering?
must we be simpering?
must you be simpering?
must they be simpering? 	must I have simpered?
must you have simpered?
must she have simpered?
must we have simpered?
must you have simpered?
must they have simpered? 	must I have been simpering?
must you have been simpering?
must she have been simpering?
must we have been simpering?
must you have been simpering?
must they have been simpering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I simper?
mustn't you simper?
mustn't she simper?
mustn't we simper?
mustn't you simper?
mustn't they simper? 	mustn't I be simpering?
mustn't you be simpering?
mustn't she be simpering?
mustn't we be simpering?
mustn't you be simpering?
mustn't they be simpering? 	mustn't I have simpered?
mustn't you have simpered?
mustn't she have simpered?
mustn't we have simpered?
mustn't you have simpered?
mustn't they have simpered? 	mustn't I have been simpering?
mustn't you have been simpering?
mustn't she have been simpering?
mustn't we have been simpering?
mustn't you have been simpering?
mustn't they have been simpering?