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 could not thread
you could not thread
he could not thread
we could not thread
you could not thread
they could not thread

V-ing form

I could not be threading
you could not be threading
he could not be threading
we could not be threading
you could not be threading
they could not be threading

Perfect

I could not have threaded
you could not have threaded
he could not have threaded
we could not have threaded
you could not have threaded
they could not have threaded

V-ing perfect

I could not have been threading
you could not have been threading
he could not have been threading
we could not have been threading
you could not have been threading
they could not 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

could I not thread?
could you not thread?
could he not thread?
could we not thread?
could you not thread?
could they not thread?

V-ing form

could I not be threading?
could you not be threading?
could he not be threading?
could we not be threading?
could you not be threading?
could they not be threading?

Perfect

could I not have threaded?
could you not have threaded?
could he not have threaded?
could we not have threaded?
could you not have threaded?
could they not have threaded?

V-ing perfect

could I not have been threading?
could you not have been threading?
could he not have been threading?
could we not have been threading?
could you not have been threading?
could they not have been threading?

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