English verb conjugation COULD VENTILATE

Regular verb: ventilate - ventilated - ventilated

Affirmation

Simple form

I could ventilate
you could ventilate
he could ventilate
we could ventilate
you could ventilate
they could ventilate

V-ing form

I could be ventilating
you could be ventilating
he could be ventilating
we could be ventilating
you could be ventilating
they could be ventilating

Perfect

I could have ventilated
you could have ventilated
he could have ventilated
we could have ventilated
you could have ventilated
they could have ventilated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I ventilate?
could you ventilate?
could he ventilate?
could we ventilate?
could you ventilate?
could they ventilate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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