English verb conjugation
COULD CURTSY

Regular verb: curtsy - curtsied - curtsied

Affirmation

Simple form	V-ing form
I could curtsy you could curtsy he could curtsy we could curtsy you could curtsy they could curtsy	I could be curtsying you could be curtsying he could be curtsying we could be curtsying you could be curtsying they could be curtsying
Perfect	V-ing perfect
I could have curtsied you could have curtsied he could have curtsied we could have curtsied you could have curtsied they could have curtsied	I could have been curtsying you could have been curtsying he could have been curtsying we could have been curtsying you could have been curtsying they could have been curtsying

Negation

Simple form	V-ing form
I could not curtsy you could not curtsy he could not curtsy we could not curtsy you could not curtsy they could not curtsy	I could not be curtsying you could not be curtsying he could not be curtsying we could not be curtsying you could not be curtsying they could not be curtsying
Perfect	V-ing perfect
I could not have curtsied you could not have curtsied he could not have curtsied we could not have curtsied you could not have curtsied they could not have curtsied	I could not have been curtsying you could not have been curtsying he could not have been curtsying we could not have been curtsying you could not have been curtsying they could not have been curtsying

Interrogative form

Simple form	V-ing form
could I curtsy? could you curtsy? could he curtsy? could we curtsy? could you curtsy? could they curtsy?	could I be curtsying? could you be curtsying? could he be curtsying? could we be curtsying? could you be curtsying? could they be curtsying?
Perfect	V-ing perfect
could I have curtsied? could you have curtsied? could he have curtsied? could we have curtsied? could you have curtsied? could they have curtsied?	could I have been curtsying? could you have been curtsying? could he have been curtsying? could we have been curtsying? could you have been curtsying? could they have been curtsying?

Interro-negative form

Simple form	V-ing form
could I not curtsy? could you not curtsy? could he not curtsy? could we not curtsy? could you not curtsy? could they not curtsy?	could I not be curtsying? could you not be curtsying? could he not be curtsying? could we not be curtsying? could you not be curtsying? could they not be curtsying?
Perfect	V-ing perfect
could I not have curtsied? could you not have curtsied? could he not have curtsied? could we not have curtsied? could you not have curtsied? could they not have curtsied?	could I not have been curtsying? could you not have been curtsying? could he not have been curtsying? could we not have been curtsying? could you not have been curtsying? could they not have been curtsying?