I can den you can den he can den we can den you can den they can den
V-ing form
I can be dening you can be dening he can be dening we can be dening you can be dening they can be dening
Perfect
I can have dened you can have dened he can have dened we can have dened you can have dened they can have dened
V-ing perfect
I can have been dening you can have been dening he can have been dening we can have been dening you can have been dening they can have been dening
Negation
Simple form
I can't den you can't den he can't den we can't den you can't den they can't den
V-ing form
I can't be dening you can't be dening he can't be dening we can't be dening you can't be dening they can't be dening
Perfect
I can't have dened you can't have dened he can't have dened we can't have dened you can't have dened they can't have dened
V-ing perfect
I can't have been dening you can't have been dening he can't have been dening we can't have been dening you can't have been dening they can't have been dening
Interrogative form
Simple form
can I den? can you den? can he den? can we den? can you den? can they den?
V-ing form
can I be dening? can you be dening? can he be dening? can we be dening? can you be dening? can they be dening?
Perfect
can I have dened? can you have dened? can he have dened? can we have dened? can you have dened? can they have dened?
V-ing perfect
can I have been dening? can you have been dening? can he have been dening? can we have been dening? can you have been dening? can they have been dening?
Interro-negative form
Simple form
can't I den? can't you den? can't he den? can't we den? can't you den? can't they den?
V-ing form
can't I be dening? can't you be dening? can't he be dening? can't we be dening? can't you be dening? can't they be dening?
Perfect
can't I have dened? can't you have dened? can't he have dened? can't we have dened? can't you have dened? can't they have dened?
V-ing perfect
can't I have been dening? can't you have been dening? can't he have been dening? can't we have been dening? can't you have been dening? can't they have been dening?