English verb conjugation COULD SLIPPER

Regular verb: slipper - slippered - slippered

Affirmation

Simple form

I could slipper
you could slipper
he could slipper
we could slipper
you could slipper
they could slipper

V-ing form

I could be slippering
you could be slippering
he could be slippering
we could be slippering
you could be slippering
they could be slippering

Perfect

I could have slippered
you could have slippered
he could have slippered
we could have slippered
you could have slippered
they could have slippered

V-ing perfect

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

Negation

Simple form

I could not slipper
you could not slipper
he could not slipper
we could not slipper
you could not slipper
they could not slipper

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I slipper?
could you slipper?
could he slipper?
could we slipper?
could you slipper?
could they slipper?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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