English verb conjugation COULD UNTHREAD

Regular verb: unthread - unthreaded - unthreaded

Affirmation

Simple form

I could unthread
you could unthread
he could unthread
we could unthread
you could unthread
they could unthread

V-ing form

I could be unthreading
you could be unthreading
he could be unthreading
we could be unthreading
you could be unthreading
they could be unthreading

Perfect

I could have unthreaded
you could have unthreaded
he could have unthreaded
we could have unthreaded
you could have unthreaded
they could have unthreaded

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I unthread?
could you unthread?
could he unthread?
could we unthread?
could you unthread?
could they unthread?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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