I can broaden you can broaden she can broaden we can broaden you can broaden they can broaden
V-ing form
I can be broadening you can be broadening she can be broadening we can be broadening you can be broadening they can be broadening
Perfect
I can have broadened you can have broadened she 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 she 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 she 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 she 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 she 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 she 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 she broaden? can we broaden? can you broaden? can they broaden?
V-ing form
can I be broadening? can you be broadening? can she be broadening? can we be broadening? can you be broadening? can they be broadening?
Perfect
can I have broadened? can you have broadened? can she 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 she 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 she 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 she 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 she 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 she have been broadening? can't we have been broadening? can't you have been broadening? can't they have been broadening?