English verb conjugation
CAN MUFF

Regular verb: muff - muffed - muffed

Affirmation

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

Negation

Simple form	V-ing form
I can't muff you can't muff he can't muff we can't muff you can't muff they can't muff	I can't be muffing you can't be muffing he can't be muffing we can't be muffing you can't be muffing they can't be muffing
Perfect	V-ing perfect
I can't have muffed you can't have muffed he can't have muffed we can't have muffed you can't have muffed they can't have muffed	I can't have been muffing you can't have been muffing he can't have been muffing we can't have been muffing you can't have been muffing they can't have been muffing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I muff? can't you muff? can't he muff? can't we muff? can't you muff? can't they muff?	can't I be muffing? can't you be muffing? can't he be muffing? can't we be muffing? can't you be muffing? can't they be muffing?
Perfect	V-ing perfect
can't I have muffed? can't you have muffed? can't he have muffed? can't we have muffed? can't you have muffed? can't they have muffed?	can't I have been muffing? can't you have been muffing? can't he have been muffing? can't we have been muffing? can't you have been muffing? can't they have been muffing?