English verb conjugation
CAN FRONT

Regular verb: front - fronted - fronted

Affirmation

Simple form	V-ing form
I can front you can front he can front we can front you can front they can front	I can be fronting you can be fronting he can be fronting we can be fronting you can be fronting they can be fronting
Perfect	V-ing perfect
I can have fronted you can have fronted he can have fronted we can have fronted you can have fronted they can have fronted	I can have been fronting you can have been fronting he can have been fronting we can have been fronting you can have been fronting they can have been fronting

Negation

Simple form	V-ing form
I cannot front you cannot front he cannot front we cannot front you cannot front they cannot front	I cannot be fronting you cannot be fronting he cannot be fronting we cannot be fronting you cannot be fronting they cannot be fronting
Perfect	V-ing perfect
I cannot have fronted you cannot have fronted he cannot have fronted we cannot have fronted you cannot have fronted they cannot have fronted	I cannot have been fronting you cannot have been fronting he cannot have been fronting we cannot have been fronting you cannot have been fronting they cannot have been fronting

Interrogative form

Simple form	V-ing form
can I front? can you front? can he front? can we front? can you front? can they front?	can I be fronting? can you be fronting? can he be fronting? can we be fronting? can you be fronting? can they be fronting?
Perfect	V-ing perfect
can I have fronted? can you have fronted? can he have fronted? can we have fronted? can you have fronted? can they have fronted?	can I have been fronting? can you have been fronting? can he have been fronting? can we have been fronting? can you have been fronting? can they have been fronting?

Interro-negative form

Simple form	V-ing form
can I not front? can you not front? can he not front? can we not front? can you not front? can they not front?	can I not be fronting? can you not be fronting? can he not be fronting? can we not be fronting? can you not be fronting? can they not be fronting?
Perfect	V-ing perfect
can I not have fronted? can you not have fronted? can he not have fronted? can we not have fronted? can you not have fronted? can they not have fronted?	can I not have been fronting? can you not have been fronting? can he not have been fronting? can we not have been fronting? can you not have been fronting? can they not have been fronting?