I can sadden you can sadden he can sadden we can sadden you can sadden they can sadden
V-ing form
I can be saddening you can be saddening he can be saddening we can be saddening you can be saddening they can be saddening
Perfect
I can have saddened you can have saddened he can have saddened we can have saddened you can have saddened they can have saddened
V-ing perfect
I can have been saddening you can have been saddening he can have been saddening we can have been saddening you can have been saddening they can have been saddening
Negation
Simple form
I cannot sadden you cannot sadden he cannot sadden we cannot sadden you cannot sadden they cannot sadden
V-ing form
I cannot be saddening you cannot be saddening he cannot be saddening we cannot be saddening you cannot be saddening they cannot be saddening
Perfect
I cannot have saddened you cannot have saddened he cannot have saddened we cannot have saddened you cannot have saddened they cannot have saddened
V-ing perfect
I cannot have been saddening you cannot have been saddening he cannot have been saddening we cannot have been saddening you cannot have been saddening they cannot have been saddening
Interrogative form
Simple form
can I sadden? can you sadden? can he sadden? can we sadden? can you sadden? can they sadden?
V-ing form
can I be saddening? can you be saddening? can he be saddening? can we be saddening? can you be saddening? can they be saddening?
Perfect
can I have saddened? can you have saddened? can he have saddened? can we have saddened? can you have saddened? can they have saddened?
V-ing perfect
can I have been saddening? can you have been saddening? can he have been saddening? can we have been saddening? can you have been saddening? can they have been saddening?
Interro-negative form
Simple form
can I not sadden? can you not sadden? can he not sadden? can we not sadden? can you not sadden? can they not sadden?
V-ing form
can I not be saddening? can you not be saddening? can he not be saddening? can we not be saddening? can you not be saddening? can they not be saddening?
Perfect
can I not have saddened? can you not have saddened? can he not have saddened? can we not have saddened? can you not have saddened? can they not have saddened?
V-ing perfect
can I not have been saddening? can you not have been saddening? can he not have been saddening? can we not have been saddening? can you not have been saddening? can they not have been saddening?