English verb conjugation COULD STIFLE

Regular verb: stifle - stifled - stifled

Affirmation

Simple form

I could stifle
you could stifle
he could stifle
we could stifle
you could stifle
they could stifle

V-ing form

I could be stifling
you could be stifling
he could be stifling
we could be stifling
you could be stifling
they could be stifling

Perfect

I could have stifled
you could have stifled
he could have stifled
we could have stifled
you could have stifled
they could have stifled

V-ing perfect

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

Negation

Simple form

I could not stifle
you could not stifle
he could not stifle
we could not stifle
you could not stifle
they could not stifle

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I stifle?
could you stifle?
could he stifle?
could we stifle?
could you stifle?
could they stifle?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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