I can formalize you can formalize he can formalize we can formalize you can formalize they can formalize
V-ing form
I can be formalizing you can be formalizing he can be formalizing we can be formalizing you can be formalizing they can be formalizing
Perfect
I can have formalized you can have formalized he can have formalized we can have formalized you can have formalized they can have formalized
V-ing perfect
I can have been formalizing you can have been formalizing he can have been formalizing we can have been formalizing you can have been formalizing they can have been formalizing
Negation
Simple form
I can't formalize you can't formalize he can't formalize we can't formalize you can't formalize they can't formalize
V-ing form
I can't be formalizing you can't be formalizing he can't be formalizing we can't be formalizing you can't be formalizing they can't be formalizing
Perfect
I can't have formalized you can't have formalized he can't have formalized we can't have formalized you can't have formalized they can't have formalized
V-ing perfect
I can't have been formalizing you can't have been formalizing he can't have been formalizing we can't have been formalizing you can't have been formalizing they can't have been formalizing
Interrogative form
Simple form
can I formalize? can you formalize? can he formalize? can we formalize? can you formalize? can they formalize?
V-ing form
can I be formalizing? can you be formalizing? can he be formalizing? can we be formalizing? can you be formalizing? can they be formalizing?
Perfect
can I have formalized? can you have formalized? can he have formalized? can we have formalized? can you have formalized? can they have formalized?
V-ing perfect
can I have been formalizing? can you have been formalizing? can he have been formalizing? can we have been formalizing? can you have been formalizing? can they have been formalizing?
Interro-negative form
Simple form
can't I formalize? can't you formalize? can't he formalize? can't we formalize? can't you formalize? can't they formalize?
V-ing form
can't I be formalizing? can't you be formalizing? can't he be formalizing? can't we be formalizing? can't you be formalizing? can't they be formalizing?
Perfect
can't I have formalized? can't you have formalized? can't he have formalized? can't we have formalized? can't you have formalized? can't they have formalized?
V-ing perfect
can't I have been formalizing? can't you have been formalizing? can't he have been formalizing? can't we have been formalizing? can't you have been formalizing? can't they have been formalizing?