English verb conjugation COULD SINGE

Regular verb: singe - singed - singed

Affirmation

Simple form

I could singe
you could singe
he could singe
we could singe
you could singe
they could singe

V-ing form

I could be singing
you could be singing
he could be singing
we could be singing
you could be singing
they could be singing

Perfect

I could have singed
you could have singed
he could have singed
we could have singed
you could have singed
they could have singed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I singe?
could you singe?
could he singe?
could we singe?
could you singe?
could they singe?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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