English verb conjugation
MUST CURTSEY

Regular verb: curtsey - curtseyed - curtseyed

Affirmation

Simple form	V-ing form
I must curtsey you must curtsey he must curtsey we must curtsey you must curtsey they must curtsey	I must be curtseying you must be curtseying he must be curtseying we must be curtseying you must be curtseying they must be curtseying
Perfect	V-ing perfect
I must have curtseyed you must have curtseyed he must have curtseyed we must have curtseyed you must have curtseyed they must have curtseyed	I must have been curtseying you must have been curtseying he must have been curtseying we must have been curtseying you must have been curtseying they must have been curtseying

Negation

Simple form	V-ing form
I must not curtsey you must not curtsey he must not curtsey we must not curtsey you must not curtsey they must not curtsey	I must not be curtseying you must not be curtseying he must not be curtseying we must not be curtseying you must not be curtseying they must not be curtseying
Perfect	V-ing perfect
I must not have curtseyed you must not have curtseyed he must not have curtseyed we must not have curtseyed you must not have curtseyed they must not have curtseyed	I must not have been curtseying you must not have been curtseying he must not have been curtseying we must not have been curtseying you must not have been curtseying they must not have been curtseying

Interrogative form

Simple form	V-ing form
must I curtsey? must you curtsey? must he curtsey? must we curtsey? must you curtsey? must they curtsey?	must I be curtseying? must you be curtseying? must he be curtseying? must we be curtseying? must you be curtseying? must they be curtseying?
Perfect	V-ing perfect
must I have curtseyed? must you have curtseyed? must he have curtseyed? must we have curtseyed? must you have curtseyed? must they have curtseyed?	must I have been curtseying? must you have been curtseying? must he have been curtseying? must we have been curtseying? must you have been curtseying? must they have been curtseying?

Interro-negative form

Simple form	V-ing form
must I not curtsey? must you not curtsey? must he not curtsey? must we not curtsey? must you not curtsey? must they not curtsey?	must I not be curtseying? must you not be curtseying? must he not be curtseying? must we not be curtseying? must you not be curtseying? must they not be curtseying?
Perfect	V-ing perfect
must I not have curtseyed? must you not have curtseyed? must he not have curtseyed? must we not have curtseyed? must you not have curtseyed? must they not have curtseyed?	must I not have been curtseying? must you not have been curtseying? must he not have been curtseying? must we not have been curtseying? must you not have been curtseying? must they not have been curtseying?