English verb conjugation COULD STERILIZE

Regular verb: sterilize - sterilized - sterilized

Affirmation

Simple form

I could sterilize
you could sterilize
he could sterilize
we could sterilize
you could sterilize
they could sterilize

V-ing form

I could be sterilizing
you could be sterilizing
he could be sterilizing
we could be sterilizing
you could be sterilizing
they could be sterilizing

Perfect

I could have sterilized
you could have sterilized
he could have sterilized
we could have sterilized
you could have sterilized
they could have sterilized

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sterilize?
could you sterilize?
could he sterilize?
could we sterilize?
could you sterilize?
could they sterilize?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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