English verb conjugation
COULD CURTSY

Regular verb: curtsy - curtsied - curtsied

Affirmation

Simple form	V-ing form
I could curtsy you could curtsy she could curtsy we could curtsy you could curtsy they could curtsy	I could be curtsying you could be curtsying she 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 she 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 she 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 couldn't curtsy you couldn't curtsy she couldn't curtsy we couldn't curtsy you couldn't curtsy they couldn't curtsy	I couldn't be curtsying you couldn't be curtsying she couldn't be curtsying we couldn't be curtsying you couldn't be curtsying they couldn't be curtsying
Perfect	V-ing perfect
I couldn't have curtsied you couldn't have curtsied she couldn't have curtsied we couldn't have curtsied you couldn't have curtsied they couldn't have curtsied	I couldn't have been curtsying you couldn't have been curtsying she couldn't have been curtsying we couldn't have been curtsying you couldn't have been curtsying they couldn't have been curtsying

Interrogative form

Simple form	V-ing form
could I curtsy? could you curtsy? could she curtsy? could we curtsy? could you curtsy? could they curtsy?	could I be curtsying? could you be curtsying? could she 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 she 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 she 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
couldn't I curtsy? couldn't you curtsy? couldn't she curtsy? couldn't we curtsy? couldn't you curtsy? couldn't they curtsy?	couldn't I be curtsying? couldn't you be curtsying? couldn't she be curtsying? couldn't we be curtsying? couldn't you be curtsying? couldn't they be curtsying?
Perfect	V-ing perfect
couldn't I have curtsied? couldn't you have curtsied? couldn't she have curtsied? couldn't we have curtsied? couldn't you have curtsied? couldn't they have curtsied?	couldn't I have been curtsying? couldn't you have been curtsying? couldn't she have been curtsying? couldn't we have been curtsying? couldn't you have been curtsying? couldn't they have been curtsying?