can preface
Regular verb: preface - prefaced- prefaced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can preface
you can preface
he can preface
we can preface
you can preface
they can preface 	I can be prefacing
you can be prefacing
he can be prefacing
we can be prefacing
you can be prefacing
they can be prefacing	I can have prefaced
you can have prefaced
he can have prefaced
we can have prefaced
you can have prefaced
they can have prefaced	I can have been prefacing
you can have been prefacing
he can have been prefacing
we can have been prefacing
you can have been prefacing
they can have been prefacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't preface
you can't preface
he can't preface
we can't preface
you can't preface
they can't preface 	I can't be prefacing
you can't be prefacing
he can't be prefacing
we can't be prefacing
you can't be prefacing
they can't be prefacing	I can't have prefaced
you can't have prefaced
he can't have prefaced
we can't have prefaced
you can't have prefaced
they can't have prefaced	I can't have been prefacing
you can't have been prefacing
he can't have been prefacing
we can't have been prefacing
you can't have been prefacing
they can't have been prefacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I preface?
can you preface?
can he preface?
can we preface?
can you preface?
can they preface? 	can I be prefacing?
can you be prefacing?
can he be prefacing?
can we be prefacing?
can you be prefacing?
can they be prefacing? 	can I have prefaced?
can you have prefaced?
can he have prefaced?
can we have prefaced?
can you have prefaced?
can they have prefaced? 	can I have been prefacing?
can you have been prefacing?
can he have been prefacing?
can we have been prefacing?
can you have been prefacing?
can they have been prefacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I preface?
can't you preface?
can't he preface?
can't we preface?
can't you preface?
can't they preface? 	can't I be prefacing?
can't you be prefacing?
can't he be prefacing?
can't we be prefacing?
can't you be prefacing?
can't they be prefacing? 	can't I have prefaced?
can't you have prefaced?
can't he have prefaced?
can't we have prefaced?
can't you have prefaced?
can't they have prefaced? 	can't I have been prefacing?
can't you have been prefacing?
can't he have been prefacing?
can't we have been prefacing?
can't you have been prefacing?
can't they have been prefacing?