could decrease
Verbo regolare: decrease - decreased- decreased

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could decrease
you could decrease
he could decrease
we could decrease
you could decrease
they could decrease 	I could be decreasing
you could be decreasing
he could be decreasing
we could be decreasing
you could be decreasing
they could be decreasing	I could have decreased
you could have decreased
he could have decreased
we could have decreased
you could have decreased
they could have decreased	I could have been decreasing
you could have been decreasing
he could have been decreasing
we could have been decreasing
you could have been decreasing
they could have been decreasing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not decrease
you could not decrease
he could not decrease
we could not decrease
you could not decrease
they could not decrease 	I could not be decreasing
you could not be decreasing
he could not be decreasing
we could not be decreasing
you could not be decreasing
they could not be decreasing	I could not have decreased
you could not have decreased
he could not have decreased
we could not have decreased
you could not have decreased
they could not have decreased	I could not have been decreasing
you could not have been decreasing
he could not have been decreasing
we could not have been decreasing
you could not have been decreasing
they could not have been decreasing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I decrease?
could you decrease?
could he decrease?
could we decrease?
could you decrease?
could they decrease? 	could I be decreasing?
could you be decreasing?
could he be decreasing?
could we be decreasing?
could you be decreasing?
could they be decreasing? 	could I have decreased?
could you have decreased?
could he have decreased?
could we have decreased?
could you have decreased?
could they have decreased? 	could I have been decreasing?
could you have been decreasing?
could he have been decreasing?
could we have been decreasing?
could you have been decreasing?
could they have been decreasing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not decrease?
could you not decrease?
could he not decrease?
could we not decrease?
could you not decrease?
could they not decrease? 	could I not be decreasing?
could you not be decreasing?
could he not be decreasing?
could we not be decreasing?
could you not be decreasing?
could they not be decreasing? 	could I not have decreased?
could you not have decreased?
could he not have decreased?
could we not have decreased?
could you not have decreased?
could they not have decreased? 	could I not have been decreasing?
could you not have been decreasing?
could he not have been decreasing?
could we not have been decreasing?
could you not have been decreasing?
could they not have been decreasing?