English verb conjugation COULD PREBOIL

Regular verb: preboil - preboiled - preboiled

Affirmation

Simple form

I could preboil
you could preboil
he could preboil
we could preboil
you could preboil
they could preboil

V-ing form

I could be preboiling
you could be preboiling
he could be preboiling
we could be preboiling
you could be preboiling
they could be preboiling

Perfect

I could have preboiled
you could have preboiled
he could have preboiled
we could have preboiled
you could have preboiled
they could have preboiled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I preboil?
could you preboil?
could he preboil?
could we preboil?
could you preboil?
could they preboil?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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