I can unify you can unify she can unify we can unify you can unify they can unify
V-ing form
I can be unifying you can be unifying she can be unifying we can be unifying you can be unifying they can be unifying
Perfect
I can have unified you can have unified she can have unified we can have unified you can have unified they can have unified
V-ing perfect
I can have been unifying you can have been unifying she can have been unifying we can have been unifying you can have been unifying they can have been unifying
Negation
Simple form
I can't unify you can't unify she can't unify we can't unify you can't unify they can't unify
V-ing form
I can't be unifying you can't be unifying she can't be unifying we can't be unifying you can't be unifying they can't be unifying
Perfect
I can't have unified you can't have unified she can't have unified we can't have unified you can't have unified they can't have unified
V-ing perfect
I can't have been unifying you can't have been unifying she can't have been unifying we can't have been unifying you can't have been unifying they can't have been unifying
Interrogative form
Simple form
can I unify? can you unify? can she unify? can we unify? can you unify? can they unify?
V-ing form
can I be unifying? can you be unifying? can she be unifying? can we be unifying? can you be unifying? can they be unifying?
Perfect
can I have unified? can you have unified? can she have unified? can we have unified? can you have unified? can they have unified?
V-ing perfect
can I have been unifying? can you have been unifying? can she have been unifying? can we have been unifying? can you have been unifying? can they have been unifying?
Interro-negative form
Simple form
can't I unify? can't you unify? can't she unify? can't we unify? can't you unify? can't they unify?
V-ing form
can't I be unifying? can't you be unifying? can't she be unifying? can't we be unifying? can't you be unifying? can't they be unifying?
Perfect
can't I have unified? can't you have unified? can't she have unified? can't we have unified? can't you have unified? can't they have unified?
V-ing perfect
can't I have been unifying? can't you have been unifying? can't she have been unifying? can't we have been unifying? can't you have been unifying? can't they have been unifying?