English verb conjugation
CAN SADDEN

Regular verb: sadden - saddened - saddened

Affirmation

Simple form	V-ing form
I can sadden you can sadden she can sadden we can sadden you can sadden they can sadden	I can be saddening you can be saddening she can be saddening we can be saddening you can be saddening they can be saddening
Perfect	V-ing perfect
I can have saddened you can have saddened she can have saddened we can have saddened you can have saddened they can have saddened	I can have been saddening you can have been saddening she can have been saddening we can have been saddening you can have been saddening they can have been saddening

Negation

Simple form	V-ing form
I can't sadden you can't sadden she can't sadden we can't sadden you can't sadden they can't sadden	I can't be saddening you can't be saddening she can't be saddening we can't be saddening you can't be saddening they can't be saddening
Perfect	V-ing perfect
I can't have saddened you can't have saddened she can't have saddened we can't have saddened you can't have saddened they can't have saddened	I can't have been saddening you can't have been saddening she can't have been saddening we can't have been saddening you can't have been saddening they can't have been saddening

Interrogative form

Simple form	V-ing form
can I sadden? can you sadden? can she sadden? can we sadden? can you sadden? can they sadden?	can I be saddening? can you be saddening? can she be saddening? can we be saddening? can you be saddening? can they be saddening?
Perfect	V-ing perfect
can I have saddened? can you have saddened? can she have saddened? can we have saddened? can you have saddened? can they have saddened?	can I have been saddening? can you have been saddening? can she have been saddening? can we have been saddening? can you have been saddening? can they have been saddening?

Interro-negative form

Simple form	V-ing form
can't I sadden? can't you sadden? can't she sadden? can't we sadden? can't you sadden? can't they sadden?	can't I be saddening? can't you be saddening? can't she be saddening? can't we be saddening? can't you be saddening? can't they be saddening?
Perfect	V-ing perfect
can't I have saddened? can't you have saddened? can't she have saddened? can't we have saddened? can't you have saddened? can't they have saddened?	can't I have been saddening? can't you have been saddening? can't she have been saddening? can't we have been saddening? can't you have been saddening? can't they have been saddening?