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 couldn't boil
you couldn't boil
he couldn't boil
we couldn't boil
you couldn't boil
they couldn't boil

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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