English verb conjugation COULD WINNOW

Regular verb: winnow - winnowed - winnowed

Affirmation

Simple form

I could winnow
you could winnow
he could winnow
we could winnow
you could winnow
they could winnow

V-ing form

I could be winnowing
you could be winnowing
he could be winnowing
we could be winnowing
you could be winnowing
they could be winnowing

Perfect

I could have winnowed
you could have winnowed
he could have winnowed
we could have winnowed
you could have winnowed
they could have winnowed

V-ing perfect

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

Negation

Simple form

I could not winnow
you could not winnow
he could not winnow
we could not winnow
you could not winnow
they could not winnow

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I winnow?
could you winnow?
could he winnow?
could we winnow?
could you winnow?
could they winnow?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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