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