English verb conjugation COULD SUBSTITUTE

Regular verb: substitute - substituted - substituted

Affirmation

Simple form

I could substitute
you could substitute
he could substitute
we could substitute
you could substitute
they could substitute

V-ing form

I could be substituting
you could be substituting
he could be substituting
we could be substituting
you could be substituting
they could be substituting

Perfect

I could have substituted
you could have substituted
he could have substituted
we could have substituted
you could have substituted
they could have substituted

V-ing perfect

I could have been substituting
you could have been substituting
he could have been substituting
we could have been substituting
you could have been substituting
they could have been substituting

Negation

Simple form

I could not substitute
you could not substitute
he could not substitute
we could not substitute
you could not substitute
they could not substitute

V-ing form

I could not be substituting
you could not be substituting
he could not be substituting
we could not be substituting
you could not be substituting
they could not be substituting

Perfect

I could not have substituted
you could not have substituted
he could not have substituted
we could not have substituted
you could not have substituted
they could not have substituted

V-ing perfect

I could not have been substituting
you could not have been substituting
he could not have been substituting
we could not have been substituting
you could not have been substituting
they could not have been substituting

Interrogative form

Simple form

could I substitute?
could you substitute?
could he substitute?
could we substitute?
could you substitute?
could they substitute?

V-ing form

could I be substituting?
could you be substituting?
could he be substituting?
could we be substituting?
could you be substituting?
could they be substituting?

Perfect

could I have substituted?
could you have substituted?
could he have substituted?
could we have substituted?
could you have substituted?
could they have substituted?

V-ing perfect

could I have been substituting?
could you have been substituting?
could he have been substituting?
could we have been substituting?
could you have been substituting?
could they have been substituting?

Interro-negative form

Simple form

could I not substitute?
could you not substitute?
could he not substitute?
could we not substitute?
could you not substitute?
could they not substitute?

V-ing form

could I not be substituting?
could you not be substituting?
could he not be substituting?
could we not be substituting?
could you not be substituting?
could they not be substituting?

Perfect

could I not have substituted?
could you not have substituted?
could he not have substituted?
could we not have substituted?
could you not have substituted?
could they not have substituted?

V-ing perfect

could I not have been substituting?
could you not have been substituting?
could he not have been substituting?
could we not have been substituting?
could you not have been substituting?
could they not have been substituting?

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