English verb conjugation COULD THREAD

Regular verb: thread - threaded - threaded

Affirmation

Simple form

I could thread
you could thread
he could thread
we could thread
you could thread
they could thread

V-ing form

I could be threading
you could be threading
he could be threading
we could be threading
you could be threading
they could be threading

Perfect

I could have threaded
you could have threaded
he could have threaded
we could have threaded
you could have threaded
they could have threaded

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I thread?
could you thread?
could he thread?
could we thread?
could you thread?
could they thread?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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