could sadden
Verbo regular: sadden - saddened- saddened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sadden
you could sadden
she could sadden
we could sadden
you could sadden
they could sadden 	I could be saddening
you could be saddening
she could be saddening
we could be saddening
you could be saddening
they could be saddening	I could have saddened
you could have saddened
she could have saddened
we could have saddened
you could have saddened
they could have saddened	I could have been saddening
you could have been saddening
she could have been saddening
we could have been saddening
you could have been saddening
they could have been saddening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sadden
you could not sadden
she could not sadden
we could not sadden
you could not sadden
they could not sadden 	I could not be saddening
you could not be saddening
she could not be saddening
we could not be saddening
you could not be saddening
they could not be saddening	I could not have saddened
you could not have saddened
she could not have saddened
we could not have saddened
you could not have saddened
they could not have saddened	I could not have been saddening
you could not have been saddening
she could not have been saddening
we could not have been saddening
you could not have been saddening
they could not have been saddening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sadden?
could you sadden?
could she sadden?
could we sadden?
could you sadden?
could they sadden? 	could I be saddening?
could you be saddening?
could she be saddening?
could we be saddening?
could you be saddening?
could they be saddening? 	could I have saddened?
could you have saddened?
could she have saddened?
could we have saddened?
could you have saddened?
could they have saddened? 	could I have been saddening?
could you have been saddening?
could she have been saddening?
could we have been saddening?
could you have been saddening?
could they have been saddening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sadden?
could you not sadden?
could she not sadden?
could we not sadden?
could you not sadden?
could they not sadden? 	could I not be saddening?
could you not be saddening?
could she not be saddening?
could we not be saddening?
could you not be saddening?
could they not be saddening? 	could I not have saddened?
could you not have saddened?
could she not have saddened?
could we not have saddened?
could you not have saddened?
could they not have saddened? 	could I not have been saddening?
could you not have been saddening?
could she not have been saddening?
could we not have been saddening?
could you not have been saddening?
could they not have been saddening?