English verb conjugation COULD FOIL

Regular verb: foil - foiled - foiled

Affirmation

Simple form

I could foil
you could foil
she could foil
we could foil
you could foil
they could foil

V-ing form

I could be foiling
you could be foiling
she could be foiling
we could be foiling
you could be foiling
they could be foiling

Perfect

I could have foiled
you could have foiled
she could have foiled
we could have foiled
you could have foiled
they could have foiled

V-ing perfect

I could have been foiling
you could have been foiling
she could have been foiling
we could have been foiling
you could have been foiling
they could have been foiling

Negation

Simple form

I could not foil
you could not foil
she could not foil
we could not foil
you could not foil
they could not foil

V-ing form

I could not be foiling
you could not be foiling
she could not be foiling
we could not be foiling
you could not be foiling
they could not be foiling

Perfect

I could not have foiled
you could not have foiled
she could not have foiled
we could not have foiled
you could not have foiled
they could not have foiled

V-ing perfect

I could not have been foiling
you could not have been foiling
she could not have been foiling
we could not have been foiling
you could not have been foiling
they could not have been foiling

Interrogative form

Simple form

could I foil?
could you foil?
could she foil?
could we foil?
could you foil?
could they foil?

V-ing form

could I be foiling?
could you be foiling?
could she be foiling?
could we be foiling?
could you be foiling?
could they be foiling?

Perfect

could I have foiled?
could you have foiled?
could she have foiled?
could we have foiled?
could you have foiled?
could they have foiled?

V-ing perfect

could I have been foiling?
could you have been foiling?
could she have been foiling?
could we have been foiling?
could you have been foiling?
could they have been foiling?

Interro-negative form

Simple form

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

V-ing form

could I not be foiling?
could you not be foiling?
could she not be foiling?
could we not be foiling?
could you not be foiling?
could they not be foiling?

Perfect

could I not have foiled?
could you not have foiled?
could she not have foiled?
could we not have foiled?
could you not have foiled?
could they not have foiled?

V-ing perfect

could I not have been foiling?
could you not have been foiling?
could she not have been foiling?
could we not have been foiling?
could you not have been foiling?
could they not have been foiling?

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