English verb conjugation COULD COUNTERSINK

Irregular verb: countersink - countersank - countersunk

Affirmation

Simple form

I could countersink
you could countersink
he could countersink
we could countersink
you could countersink
they could countersink

V-ing form

I could be countersinking
you could be countersinking
he could be countersinking
we could be countersinking
you could be countersinking
they could be countersinking

Perfect

I could have countersunk
you could have countersunk
he could have countersunk
we could have countersunk
you could have countersunk
they could have countersunk

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I countersink?
could you countersink?
could he countersink?
could we countersink?
could you countersink?
could they countersink?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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