English verb conjugation COULD SING SING

Regular verb: sing sing - sing singed - sing singed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I could sing sing
you could sing sing
she could sing sing
we could sing sing
you could sing sing
they could sing sing

V-ing form

I could be sing singing
you could be sing singing
she could be sing singing
we could be sing singing
you could be sing singing
they could be sing singing

Perfect

I could have sing singed
you could have sing singed
she could have sing singed
we could have sing singed
you could have sing singed
they could have sing singed

V-ing perfect

I could have been sing singing
you could have been sing singing
she could have been sing singing
we could have been sing singing
you could have been sing singing
they could have been sing singing

Negation

Simple form

I could not sing sing
you could not sing sing
she could not sing sing
we could not sing sing
you could not sing sing
they could not sing sing

V-ing form

I could not be sing singing
you could not be sing singing
she could not be sing singing
we could not be sing singing
you could not be sing singing
they could not be sing singing

Perfect

I could not have sing singed
you could not have sing singed
she could not have sing singed
we could not have sing singed
you could not have sing singed
they could not have sing singed

V-ing perfect

I could not have been sing singing
you could not have been sing singing
she could not have been sing singing
we could not have been sing singing
you could not have been sing singing
they could not have been sing singing

Interrogative form

Simple form

could I sing sing?
could you sing sing?
could she sing sing?
could we sing sing?
could you sing sing?
could they sing sing?

V-ing form

could I be sing singing?
could you be sing singing?
could she be sing singing?
could we be sing singing?
could you be sing singing?
could they be sing singing?

Perfect

could I have sing singed?
could you have sing singed?
could she have sing singed?
could we have sing singed?
could you have sing singed?
could they have sing singed?

V-ing perfect

could I have been sing singing?
could you have been sing singing?
could she have been sing singing?
could we have been sing singing?
could you have been sing singing?
could they have been sing singing?

Interro-negative form

Simple form

could I not sing sing?
could you not sing sing?
could she not sing sing?
could we not sing sing?
could you not sing sing?
could they not sing sing?

V-ing form

could I not be sing singing?
could you not be sing singing?
could she not be sing singing?
could we not be sing singing?
could you not be sing singing?
could they not be sing singing?

Perfect

could I not have sing singed?
could you not have sing singed?
could she not have sing singed?
could we not have sing singed?
could you not have sing singed?
could they not have sing singed?

V-ing perfect

could I not have been sing singing?
could you not have been sing singing?
could she not have been sing singing?
could we not have been sing singing?
could you not have been sing singing?
could they not have been sing singing?

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