Conjugaison du verbe anglais COULD NICKER

I could nicker
you could nicker
she could nicker
we could nicker
you could nicker
they could nicker

I could be nickering
you could be nickering
she could be nickering
we could be nickering
you could be nickering
they could be nickering

I could have nickered
you could have nickered
she could have nickered
we could have nickered
you could have nickered
they could have nickered

I could have been nickering
you could have been nickering
she could have been nickering
we could have been nickering
you could have been nickering
they could have been nickering

I could not nicker
you could not nicker
she could not nicker
we could not nicker
you could not nicker
they could not nicker

I could not be nickering
you could not be nickering
she could not be nickering
we could not be nickering
you could not be nickering
they could not be nickering

I could not have nickered
you could not have nickered
she could not have nickered
we could not have nickered
you could not have nickered
they could not have nickered

I could not have been nickering
you could not have been nickering
she could not have been nickering
we could not have been nickering
you could not have been nickering
they could not have been nickering

could I nicker?
could you nicker?
could she nicker?
could we nicker?
could you nicker?
could they nicker?

could I be nickering?
could you be nickering?
could she be nickering?
could we be nickering?
could you be nickering?
could they be nickering?

could I have nickered?
could you have nickered?
could she have nickered?
could we have nickered?
could you have nickered?
could they have nickered?

could I have been nickering?
could you have been nickering?
could she have been nickering?
could we have been nickering?
could you have been nickering?
could they have been nickering?

could I not nicker?
could you not nicker?
could she not nicker?
could we not nicker?
could you not nicker?
could they not nicker?

could I not be nickering?
could you not be nickering?
could she not be nickering?
could we not be nickering?
could you not be nickering?
could they not be nickering?

could I not have nickered?
could you not have nickered?
could she not have nickered?
could we not have nickered?
could you not have nickered?
could they not have nickered?

could I not have been nickering?
could you not have been nickering?
could she not have been nickering?
could we not have been nickering?
could you not have been nickering?
could they not have been nickering?