should muff
Regular verb: muff - muffed- muffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should muff
you should muff
he should muff
we should muff
you should muff
they should muff 	I should be muffing
you should be muffing
he should be muffing
we should be muffing
you should be muffing
they should be muffing	I should have muffed
you should have muffed
he should have muffed
we should have muffed
you should have muffed
they should have muffed	I should have been muffing
you should have been muffing
he should have been muffing
we should have been muffing
you should have been muffing
they should have been muffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not muff
you should not muff
he should not muff
we should not muff
you should not muff
they should not muff 	I should not be muffing
you should not be muffing
he should not be muffing
we should not be muffing
you should not be muffing
they should not be muffing	I should not have muffed
you should not have muffed
he should not have muffed
we should not have muffed
you should not have muffed
they should not have muffed	I should not have been muffing
you should not have been muffing
he should not have been muffing
we should not have been muffing
you should not have been muffing
they should not have been muffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I muff?
should you muff?
should he muff?
should we muff?
should you muff?
should they muff? 	should I be muffing?
should you be muffing?
should he be muffing?
should we be muffing?
should you be muffing?
should they be muffing? 	should I have muffed?
should you have muffed?
should he have muffed?
should we have muffed?
should you have muffed?
should they have muffed? 	should I have been muffing?
should you have been muffing?
should he have been muffing?
should we have been muffing?
should you have been muffing?
should they have been muffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not muff?
should you not muff?
should he not muff?
should we not muff?
should you not muff?
should they not muff? 	should I not be muffing?
should you not be muffing?
should he not be muffing?
should we not be muffing?
should you not be muffing?
should they not be muffing? 	should I not have muffed?
should you not have muffed?
should he not have muffed?
should we not have muffed?
should you not have muffed?
should they not have muffed? 	should I not have been muffing?
should you not have been muffing?
should he not have been muffing?
should we not have been muffing?
should you not have been muffing?
should they not have been muffing?