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 couldn't stale
you couldn't stale
he couldn't stale
we couldn't stale
you couldn't stale
they couldn't stale

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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