English verb conjugation COULD STALE

Regular verb: stale - staled - staled

Affirmation

Simple form

I could stale
you could stale
he could stale
we could stale
you could stale
they could stale

V-ing form

I could be staling
you could be staling
he could be staling
we could be staling
you could be staling
they could be staling

Perfect

I could have staled
you could have staled
he could have staled
we could have staled
you could have staled
they could have staled

V-ing perfect

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

Negation

Simple form

I could not stale
you could not stale
he could not stale
we could not stale
you could not stale
they could not stale

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I stale?
could you stale?
could he stale?
could we stale?
could you stale?
could they stale?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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