English verb conjugation COULD DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

Simple form

I could decrease
you could decrease
she could decrease
we could decrease
you could decrease
they could decrease

V-ing form

I could be decreasing
you could be decreasing
she could be decreasing
we could be decreasing
you could be decreasing
they could be decreasing

Perfect

I could have decreased
you could have decreased
she could have decreased
we could have decreased
you could have decreased
they could have decreased

V-ing perfect

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

Negation

Simple form

I couldn't decrease
you couldn't decrease
she couldn't decrease
we couldn't decrease
you couldn't decrease
they couldn't decrease

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I decrease?
could you decrease?
could she decrease?
could we decrease?
could you decrease?
could they decrease?

V-ing form

could I be decreasing?
could you be decreasing?
could she be decreasing?
could we be decreasing?
could you be decreasing?
could they be decreasing?

Perfect

could I have decreased?
could you have decreased?
could she have decreased?
could we have decreased?
could you have decreased?
could they have decreased?

V-ing perfect

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?

Interro-negative form

Simple form

couldn't I decrease?
couldn't you decrease?
couldn't she decrease?
couldn't we decrease?
couldn't you decrease?
couldn't they decrease?

V-ing form

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?

Perfect

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?

V-ing perfect

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?

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