English verb conjugation
MUST CURTSY

Regular verb: curtsy - curtsied - curtsied

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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