English verb conjugation COULD BOIL

Regular verb: boil - boiled - boiled

Affirmation

Simple form

I could boil
you could boil
he could boil
we could boil
you could boil
they could boil

V-ing form

I could be boiling
you could be boiling
he could be boiling
we could be boiling
you could be boiling
they could be boiling

Perfect

I could have boiled
you could have boiled
he could have boiled
we could have boiled
you could have boiled
they could have boiled

V-ing perfect

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

Negation

Simple form

I could not boil
you could not boil
he could not boil
we could not boil
you could not boil
they could not boil

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I boil?
could you boil?
could he boil?
could we boil?
could you boil?
could they boil?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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