English verb conjugation COULD FOIL

Regular verb: foil - foiled - foiled

Affirmation

Simple form

I could foil
you could foil
he could foil
we could foil
you could foil
they could foil

V-ing form

I could be foiling
you could be foiling
he could be foiling
we could be foiling
you could be foiling
they could be foiling

Perfect

I could have foiled
you could have foiled
he 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
he could have been foiling
we could have been foiling
you could have been foiling
they could have been foiling

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I foil?
could you foil?
could he foil?
could we foil?
could you foil?
could they foil?

V-ing form

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

Perfect

could I have foiled?
could you have foiled?
could he 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 he have been foiling?
could we have been foiling?
could you have been foiling?
could they have been foiling?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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