English verb conjugation COULD SINK

Irregular verb: sink - sank, sunk - sunk

Affirmation

Simple form

I could sink
you could sink
he could sink
we could sink
you could sink
they could sink

V-ing form

I could be sinking
you could be sinking
he could be sinking
we could be sinking
you could be sinking
they could be sinking

Perfect

I could have sunk
you could have sunk
he could have sunk
we could have sunk
you could have sunk
they could have sunk

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sink?
could you sink?
could he sink?
could we sink?
could you sink?
could they sink?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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