should muss
Regular verb: muss - mussed- mussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd muss
you'd muss
she'd muss
we'd muss
you'd muss
they'd muss 	I'd be mussing
you'd be mussing
she'd be mussing
we'd be mussing
you'd be mussing
they'd be mussing	I should've mussed
you should've mussed
she should've mussed
we should've mussed
you should've mussed
they should've mussed	I should've been mussing
you should've been mussing
she should've been mussing
we should've been mussing
you should've been mussing
they should've been mussing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't muss
you shouldn't muss
she shouldn't muss
we shouldn't muss
you shouldn't muss
they shouldn't muss 	I shouldn't be mussing
you shouldn't be mussing
she shouldn't be mussing
we shouldn't be mussing
you shouldn't be mussing
they shouldn't be mussing	I shouldn't have mussed
you shouldn't have mussed
she shouldn't have mussed
we shouldn't have mussed
you shouldn't have mussed
they shouldn't have mussed	I shouldn't have been mussing
you shouldn't have been mussing
she shouldn't have been mussing
we shouldn't have been mussing
you shouldn't have been mussing
they shouldn't have been mussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I muss?
should you muss?
should she muss?
should we muss?
should you muss?
should they muss? 	should I be mussing?
should you be mussing?
should she be mussing?
should we be mussing?
should you be mussing?
should they be mussing? 	should I have mussed?
should you have mussed?
should she have mussed?
should we have mussed?
should you have mussed?
should they have mussed? 	should I have been mussing?
should you have been mussing?
should she have been mussing?
should we have been mussing?
should you have been mussing?
should they have been mussing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I muss?
shouldn't you muss?
shouldn't she muss?
shouldn't we muss?
shouldn't you muss?
shouldn't they muss? 	shouldn't I be mussing?
shouldn't you be mussing?
shouldn't she be mussing?
shouldn't we be mussing?
shouldn't you be mussing?
shouldn't they be mussing? 	shouldn't I have mussed?
shouldn't you have mussed?
shouldn't she have mussed?
shouldn't we have mussed?
shouldn't you have mussed?
shouldn't they have mussed? 	shouldn't I have been mussing?
shouldn't you have been mussing?
shouldn't she have been mussing?
shouldn't we have been mussing?
shouldn't you have been mussing?
shouldn't they have been mussing?