English verb conjugation COULD AUTHOR

Regular verb: author - authored - authored


Affirmation

Simple form

I could author
you could author
he could author
we could author
you could author
they could author

V-ing form

I could be authoring
you could be authoring
he could be authoring
we could be authoring
you could be authoring
they could be authoring

Perfect

I could have authored
you could have authored
he could have authored
we could have authored
you could have authored
they could have authored

V-ing perfect

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

Negation

Simple form

I couldn't author
you couldn't author
he couldn't author
we couldn't author
you couldn't author
they couldn't author

V-ing form

I couldn't be authoring
you couldn't be authoring
he couldn't be authoring
we couldn't be authoring
you couldn't be authoring
they couldn't be authoring

Perfect

I couldn't have authored
you couldn't have authored
he couldn't have authored
we couldn't have authored
you couldn't have authored
they couldn't have authored

V-ing perfect

I couldn't have been authoring
you couldn't have been authoring
he couldn't have been authoring
we couldn't have been authoring
you couldn't have been authoring
they couldn't have been authoring

Interrogative form

Simple form

could I author?
could you author?
could he author?
could we author?
could you author?
could they author?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I author?
couldn't you author?
couldn't he author?
couldn't we author?
couldn't you author?
couldn't they author?

V-ing form

couldn't I be authoring?
couldn't you be authoring?
couldn't he be authoring?
couldn't we be authoring?
couldn't you be authoring?
couldn't they be authoring?

Perfect

couldn't I have authored?
couldn't you have authored?
couldn't he have authored?
couldn't we have authored?
couldn't you have authored?
couldn't they have authored?

V-ing perfect

couldn't I have been authoring?
couldn't you have been authoring?
couldn't he have been authoring?
couldn't we have been authoring?
couldn't you have been authoring?
couldn't they have been authoring?