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male gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to

English verb conjugation COULD BACKDATE

Regular verb: backdate - backdated - backdated


Affirmation

Simple form
I could backdate
you could backdate
she could backdate
we could backdate
you could backdate
they could backdate
V-ing form
I could be backdating
you could be backdating
she could be backdating
we could be backdating
you could be backdating
they could be backdating
Perfect
I could have backdated
you could have backdated
she could have backdated
we could have backdated
you could have backdated
they could have backdated
V-ing perfect
I could have been backdating
you could have been backdating
she could have been backdating
we could have been backdating
you could have been backdating
they could have been backdating

Negation

Simple form
I could not backdate
you could not backdate
she could not backdate
we could not backdate
you could not backdate
they could not backdate
V-ing form
I could not be backdating
you could not be backdating
she could not be backdating
we could not be backdating
you could not be backdating
they could not be backdating
Perfect
I could not have backdated
you could not have backdated
she could not have backdated
we could not have backdated
you could not have backdated
they could not have backdated
V-ing perfect
I could not have been backdating
you could not have been backdating
she could not have been backdating
we could not have been backdating
you could not have been backdating
they could not have been backdating

Interrogative form

Simple form
could I backdate?
could you backdate?
could she backdate?
could we backdate?
could you backdate?
could they backdate?
V-ing form
could I be backdating?
could you be backdating?
could she be backdating?
could we be backdating?
could you be backdating?
could they be backdating?
Perfect
could I have backdated?
could you have backdated?
could she have backdated?
could we have backdated?
could you have backdated?
could they have backdated?
V-ing perfect
could I have been backdating?
could you have been backdating?
could she have been backdating?
could we have been backdating?
could you have been backdating?
could they have been backdating?

Interro-negative form

Simple form
could I not backdate?
could you not backdate?
could she not backdate?
could we not backdate?
could you not backdate?
could they not backdate?
V-ing form
could I not be backdating?
could you not be backdating?
could she not be backdating?
could we not be backdating?
could you not be backdating?
could they not be backdating?
Perfect
could I not have backdated?
could you not have backdated?
could she not have backdated?
could we not have backdated?
could you not have backdated?
could they not have backdated?
V-ing perfect
could I not have been backdating?
could you not have been backdating?
could she not have been backdating?
could we not have been backdating?
could you not have been backdating?
could they not have been backdating?