Conjugação do verbo inglês
COULD DECREASE

Verbo regular: decrease - decreased - decreased

Afirmação

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

Negação

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

Forma interrogativa

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

Forma interro-Negação

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