can decrease
Verbo regular: decrease - decreased- decreased

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can decrease
you can decrease
she can decrease
we can decrease
you can decrease
they can decrease 	I can be decreasing
you can be decreasing
she can be decreasing
we can be decreasing
you can be decreasing
they can be decreasing	I can have decreased
you can have decreased
she can have decreased
we can have decreased
you can have decreased
they can have decreased	I can have been decreasing
you can have been decreasing
she can have been decreasing
we can have been decreasing
you can have been decreasing
they can have been decreasing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't decrease
you can't decrease
she can't decrease
we can't decrease
you can't decrease
they can't decrease 	I can't be decreasing
you can't be decreasing
she can't be decreasing
we can't be decreasing
you can't be decreasing
they can't be decreasing	I can't have decreased
you can't have decreased
she can't have decreased
we can't have decreased
you can't have decreased
they can't have decreased	I can't have been decreasing
you can't have been decreasing
she can't have been decreasing
we can't have been decreasing
you can't have been decreasing
they can't have been decreasing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I decrease?
can you decrease?
can she decrease?
can we decrease?
can you decrease?
can they decrease? 	can I be decreasing?
can you be decreasing?
can she be decreasing?
can we be decreasing?
can you be decreasing?
can they be decreasing? 	can I have decreased?
can you have decreased?
can she have decreased?
can we have decreased?
can you have decreased?
can they have decreased? 	can I have been decreasing?
can you have been decreasing?
can she have been decreasing?
can we have been decreasing?
can you have been decreasing?
can they have been decreasing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I decrease?
can't you decrease?
can't she decrease?
can't we decrease?
can't you decrease?
can't they decrease? 	can't I be decreasing?
can't you be decreasing?
can't she be decreasing?
can't we be decreasing?
can't you be decreasing?
can't they be decreasing? 	can't I have decreased?
can't you have decreased?
can't she have decreased?
can't we have decreased?
can't you have decreased?
can't they have decreased? 	can't I have been decreasing?
can't you have been decreasing?
can't she have been decreasing?
can't we have been decreasing?
can't you have been decreasing?
can't they have been decreasing?