could commemorate
Verbo regular: commemorate - commemorated- commemorated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could commemorate
you could commemorate
he could commemorate
we could commemorate
you could commemorate
they could commemorate 	I could be commemorating
you could be commemorating
he could be commemorating
we could be commemorating
you could be commemorating
they could be commemorating	I could have commemorated
you could have commemorated
he could have commemorated
we could have commemorated
you could have commemorated
they could have commemorated	I could have been commemorating
you could have been commemorating
he could have been commemorating
we could have been commemorating
you could have been commemorating
they could have been commemorating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not commemorate
you could not commemorate
he could not commemorate
we could not commemorate
you could not commemorate
they could not commemorate 	I could not be commemorating
you could not be commemorating
he could not be commemorating
we could not be commemorating
you could not be commemorating
they could not be commemorating	I could not have commemorated
you could not have commemorated
he could not have commemorated
we could not have commemorated
you could not have commemorated
they could not have commemorated	I could not have been commemorating
you could not have been commemorating
he could not have been commemorating
we could not have been commemorating
you could not have been commemorating
they could not have been commemorating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I commemorate?
could you commemorate?
could he commemorate?
could we commemorate?
could you commemorate?
could they commemorate? 	could I be commemorating?
could you be commemorating?
could he be commemorating?
could we be commemorating?
could you be commemorating?
could they be commemorating? 	could I have commemorated?
could you have commemorated?
could he have commemorated?
could we have commemorated?
could you have commemorated?
could they have commemorated? 	could I have been commemorating?
could you have been commemorating?
could he have been commemorating?
could we have been commemorating?
could you have been commemorating?
could they have been commemorating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not commemorate?
could you not commemorate?
could he not commemorate?
could we not commemorate?
could you not commemorate?
could they not commemorate? 	could I not be commemorating?
could you not be commemorating?
could he not be commemorating?
could we not be commemorating?
could you not be commemorating?
could they not be commemorating? 	could I not have commemorated?
could you not have commemorated?
could he not have commemorated?
could we not have commemorated?
could you not have commemorated?
could they not have commemorated? 	could I not have been commemorating?
could you not have been commemorating?
could he not have been commemorating?
could we not have been commemorating?
could you not have been commemorating?
could they not have been commemorating?