English verb conjugation
MUST CURTSEY

Regular verb: curtsey - curtseyed - curtseyed

Affirmation

Simple form	V-ing form
I must curtsey you must curtsey she must curtsey we must curtsey you must curtsey they must curtsey	I must be curtseying you must be curtseying she 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 she 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 she 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 she 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 she 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 she 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 she 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 she curtsey? must we curtsey? must you curtsey? must they curtsey?	must I be curtseying? must you be curtseying? must she 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 she 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 she 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 she 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 she 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 she 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 she have been curtseying? mustn't we have been curtseying? mustn't you have been curtseying? mustn't they have been curtseying?