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 could not ventilate
you could not ventilate
he could not ventilate
we could not ventilate
you could not ventilate
they could not ventilate

V-ing form

I could not be ventilating
you could not be ventilating
he could not be ventilating
we could not be ventilating
you could not be ventilating
they could not be ventilating

Perfect

I could not have ventilated
you could not have ventilated
he could not have ventilated
we could not have ventilated
you could not have ventilated
they could not have ventilated

V-ing perfect

I could not have been ventilating
you could not have been ventilating
he could not have been ventilating
we could not have been ventilating
you could not have been ventilating
they could not 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

could I not ventilate?
could you not ventilate?
could he not ventilate?
could we not ventilate?
could you not ventilate?
could they not ventilate?

V-ing form

could I not be ventilating?
could you not be ventilating?
could he not be ventilating?
could we not be ventilating?
could you not be ventilating?
could they not be ventilating?

Perfect

could I not have ventilated?
could you not have ventilated?
could he not have ventilated?
could we not have ventilated?
could you not have ventilated?
could they not have ventilated?

V-ing perfect

could I not have been ventilating?
could you not have been ventilating?
could he not have been ventilating?
could we not have been ventilating?
could you not have been ventilating?
could they not have been ventilating?

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