English verb conjugation COULD VULCANIZE

Regular verb: vulcanize - vulcanized - vulcanized

Affirmation

Simple form

I could vulcanize
you could vulcanize
he could vulcanize
we could vulcanize
you could vulcanize
they could vulcanize

V-ing form

I could be vulcanizing
you could be vulcanizing
he could be vulcanizing
we could be vulcanizing
you could be vulcanizing
they could be vulcanizing

Perfect

I could have vulcanized
you could have vulcanized
he could have vulcanized
we could have vulcanized
you could have vulcanized
they could have vulcanized

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I vulcanize?
could you vulcanize?
could he vulcanize?
could we vulcanize?
could you vulcanize?
could they vulcanize?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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