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 couldn't slipper
you couldn't slipper
he couldn't slipper
we couldn't slipper
you couldn't slipper
they couldn't slipper

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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