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 cannot broaden you cannot broaden he cannot broaden we cannot broaden you cannot broaden they cannot broaden
V-ing form
I cannot be broadening you cannot be broadening he cannot be broadening we cannot be broadening you cannot be broadening they cannot be broadening
Perfect
I cannot have broadened you cannot have broadened he cannot have broadened we cannot have broadened you cannot have broadened they cannot have broadened
V-ing perfect
I cannot have been broadening you cannot have been broadening he cannot have been broadening we cannot have been broadening you cannot have been broadening they cannot 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 I not broaden? can you not broaden? can he not broaden? can we not broaden? can you not broaden? can they not broaden?
V-ing form
can I not be broadening? can you not be broadening? can he not be broadening? can we not be broadening? can you not be broadening? can they not be broadening?
Perfect
can I not have broadened? can you not have broadened? can he not have broadened? can we not have broadened? can you not have broadened? can they not have broadened?
V-ing perfect
can I not have been broadening? can you not have been broadening? can he not have been broadening? can we not have been broadening? can you not have been broadening? can they not have been broadening?