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 mustn't curtsey you mustn't curtsey he mustn't curtsey we mustn't curtsey you mustn't curtsey they mustn't curtsey	I mustn't be curtseying you mustn't be curtseying he mustn't be curtseying we mustn't be curtseying you mustn't be curtseying they mustn't be curtseying
Perfect	V-ing perfect
I mustn't have curtseyed you mustn't have curtseyed he mustn't have curtseyed we mustn't have curtseyed you mustn't have curtseyed they mustn't have curtseyed	I mustn't have been curtseying you mustn't have been curtseying he mustn't have been curtseying we mustn't have been curtseying you mustn't have been curtseying they mustn't 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
mustn't I curtsey? mustn't you curtsey? mustn't he curtsey? mustn't we curtsey? mustn't you curtsey? mustn't they curtsey?	mustn't I be curtseying? mustn't you be curtseying? mustn't he be curtseying? mustn't we be curtseying? mustn't you be curtseying? mustn't they be curtseying?
Perfect	V-ing perfect
mustn't I have curtseyed? mustn't you have curtseyed? mustn't he have curtseyed? mustn't we have curtseyed? mustn't you have curtseyed? mustn't they have curtseyed?	mustn't I have been curtseying? mustn't you have been curtseying? mustn't he have been curtseying? mustn't we have been curtseying? mustn't you have been curtseying? mustn't they have been curtseying?