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 couldn't backdate
you couldn't backdate
she couldn't backdate
we couldn't backdate
you couldn't backdate
they couldn't backdate

V-ing form

I couldn't be backdating
you couldn't be backdating
she couldn't be backdating
we couldn't be backdating
you couldn't be backdating
they couldn't be backdating

Perfect

I couldn't have backdated
you couldn't have backdated
she couldn't have backdated
we couldn't have backdated
you couldn't have backdated
they couldn't have backdated

V-ing perfect

I couldn't have been backdating
you couldn't have been backdating
she couldn't have been backdating
we couldn't have been backdating
you couldn't have been backdating
they couldn't 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

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

V-ing form

couldn't I be backdating?
couldn't you be backdating?
couldn't she be backdating?
couldn't we be backdating?
couldn't you be backdating?
couldn't they be backdating?

Perfect

couldn't I have backdated?
couldn't you have backdated?
couldn't she have backdated?
couldn't we have backdated?
couldn't you have backdated?
couldn't they have backdated?

V-ing perfect

couldn't I have been backdating?
couldn't you have been backdating?
couldn't she have been backdating?
couldn't we have been backdating?
couldn't you have been backdating?
couldn't they have been backdating?

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