English verb conjugation
CAN SUFFICE

Regular verb: suffice - sufficed - sufficed

Affirmation

Simple form	V-ing form
I can suffice you can suffice he can suffice we can suffice you can suffice they can suffice	I can be sufficing you can be sufficing he can be sufficing we can be sufficing you can be sufficing they can be sufficing
Perfect	V-ing perfect
I can have sufficed you can have sufficed he can have sufficed we can have sufficed you can have sufficed they can have sufficed	I can have been sufficing you can have been sufficing he can have been sufficing we can have been sufficing you can have been sufficing they can have been sufficing

Negation

Simple form	V-ing form
I can't suffice you can't suffice he can't suffice we can't suffice you can't suffice they can't suffice	I can't be sufficing you can't be sufficing he can't be sufficing we can't be sufficing you can't be sufficing they can't be sufficing
Perfect	V-ing perfect
I can't have sufficed you can't have sufficed he can't have sufficed we can't have sufficed you can't have sufficed they can't have sufficed	I can't have been sufficing you can't have been sufficing he can't have been sufficing we can't have been sufficing you can't have been sufficing they can't have been sufficing

Interrogative form

Simple form	V-ing form
can I suffice? can you suffice? can he suffice? can we suffice? can you suffice? can they suffice?	can I be sufficing? can you be sufficing? can he be sufficing? can we be sufficing? can you be sufficing? can they be sufficing?
Perfect	V-ing perfect
can I have sufficed? can you have sufficed? can he have sufficed? can we have sufficed? can you have sufficed? can they have sufficed?	can I have been sufficing? can you have been sufficing? can he have been sufficing? can we have been sufficing? can you have been sufficing? can they have been sufficing?

Interro-negative form

Simple form	V-ing form
can't I suffice? can't you suffice? can't he suffice? can't we suffice? can't you suffice? can't they suffice?	can't I be sufficing? can't you be sufficing? can't he be sufficing? can't we be sufficing? can't you be sufficing? can't they be sufficing?
Perfect	V-ing perfect
can't I have sufficed? can't you have sufficed? can't he have sufficed? can't we have sufficed? can't you have sufficed? can't they have sufficed?	can't I have been sufficing? can't you have been sufficing? can't he have been sufficing? can't we have been sufficing? can't you have been sufficing? can't they have been sufficing?