could lessen
Verbo regular: lessen - lessened- lessened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could lessen
you could lessen
she could lessen
we could lessen
you could lessen
they could lessen 	I could be lessening
you could be lessening
she could be lessening
we could be lessening
you could be lessening
they could be lessening	I could have lessened
you could have lessened
she could have lessened
we could have lessened
you could have lessened
they could have lessened	I could have been lessening
you could have been lessening
she could have been lessening
we could have been lessening
you could have been lessening
they could have been lessening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not lessen
you could not lessen
she could not lessen
we could not lessen
you could not lessen
they could not lessen 	I could not be lessening
you could not be lessening
she could not be lessening
we could not be lessening
you could not be lessening
they could not be lessening	I could not have lessened
you could not have lessened
she could not have lessened
we could not have lessened
you could not have lessened
they could not have lessened	I could not have been lessening
you could not have been lessening
she could not have been lessening
we could not have been lessening
you could not have been lessening
they could not have been lessening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I lessen?
could you lessen?
could she lessen?
could we lessen?
could you lessen?
could they lessen? 	could I be lessening?
could you be lessening?
could she be lessening?
could we be lessening?
could you be lessening?
could they be lessening? 	could I have lessened?
could you have lessened?
could she have lessened?
could we have lessened?
could you have lessened?
could they have lessened? 	could I have been lessening?
could you have been lessening?
could she have been lessening?
could we have been lessening?
could you have been lessening?
could they have been lessening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not lessen?
could you not lessen?
could she not lessen?
could we not lessen?
could you not lessen?
could they not lessen? 	could I not be lessening?
could you not be lessening?
could she not be lessening?
could we not be lessening?
could you not be lessening?
could they not be lessening? 	could I not have lessened?
could you not have lessened?
could she not have lessened?
could we not have lessened?
could you not have lessened?
could they not have lessened? 	could I not have been lessening?
could you not have been lessening?
could she not have been lessening?
could we not have been lessening?
could you not have been lessening?
could they not have been lessening?