English verb conjugation COULD SULFURIZE

Regular verb: sulfurize - sulfurized - sulfurized

Affirmation

Simple form

I could sulfurize
you could sulfurize
he could sulfurize
we could sulfurize
you could sulfurize
they could sulfurize

V-ing form

I could be sulfurizing
you could be sulfurizing
he could be sulfurizing
we could be sulfurizing
you could be sulfurizing
they could be sulfurizing

Perfect

I could have sulfurized
you could have sulfurized
he could have sulfurized
we could have sulfurized
you could have sulfurized
they could have sulfurized

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sulfurize?
could you sulfurize?
could he sulfurize?
could we sulfurize?
could you sulfurize?
could they sulfurize?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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