must curtsey
Verbo regular: curtsey - curtseyed- curtseyed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?