I can broaden you can broaden he can broaden we can broaden you can broaden they can broaden
V-ing form
I can be broadening you can be broadening he can be broadening we can be broadening you can be broadening they can be broadening
Perfect
I can have broadened you can have broadened he can have broadened we can have broadened you can have broadened they can have broadened
V-ing perfect
I can have been broadening you can have been broadening he can have been broadening we can have been broadening you can have been broadening they can have been broadening
Negation
Simple form
I can't broaden you can't broaden he can't broaden we can't broaden you can't broaden they can't broaden
V-ing form
I can't be broadening you can't be broadening he can't be broadening we can't be broadening you can't be broadening they can't be broadening
Perfect
I can't have broadened you can't have broadened he can't have broadened we can't have broadened you can't have broadened they can't have broadened
V-ing perfect
I can't have been broadening you can't have been broadening he can't have been broadening we can't have been broadening you can't have been broadening they can't have been broadening
Interrogative form
Simple form
can I broaden? can you broaden? can he broaden? can we broaden? can you broaden? can they broaden?
V-ing form
can I be broadening? can you be broadening? can he be broadening? can we be broadening? can you be broadening? can they be broadening?
Perfect
can I have broadened? can you have broadened? can he have broadened? can we have broadened? can you have broadened? can they have broadened?
V-ing perfect
can I have been broadening? can you have been broadening? can he have been broadening? can we have been broadening? can you have been broadening? can they have been broadening?
Interro-negative form
Simple form
can't I broaden? can't you broaden? can't he broaden? can't we broaden? can't you broaden? can't they broaden?
V-ing form
can't I be broadening? can't you be broadening? can't he be broadening? can't we be broadening? can't you be broadening? can't they be broadening?
Perfect
can't I have broadened? can't you have broadened? can't he have broadened? can't we have broadened? can't you have broadened? can't they have broadened?
V-ing perfect
can't I have been broadening? can't you have been broadening? can't he have been broadening? can't we have been broadening? can't you have been broadening? can't they have been broadening?