must prebuy
Irregular verb: prebuy - prebought- prebought

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prebuy
you must prebuy
he must prebuy
we must prebuy
you must prebuy
they must prebuy 	I must be prebuying
you must be prebuying
he must be prebuying
we must be prebuying
you must be prebuying
they must be prebuying	I must have prebought
you must have prebought
he must have prebought
we must have prebought
you must have prebought
they must have prebought	I must have been prebuying
you must have been prebuying
he must have been prebuying
we must have been prebuying
you must have been prebuying
they must have been prebuying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prebuy
you mustn't prebuy
he mustn't prebuy
we mustn't prebuy
you mustn't prebuy
they mustn't prebuy 	I mustn't be prebuying
you mustn't be prebuying
he mustn't be prebuying
we mustn't be prebuying
you mustn't be prebuying
they mustn't be prebuying	I mustn't have prebought
you mustn't have prebought
he mustn't have prebought
we mustn't have prebought
you mustn't have prebought
they mustn't have prebought	I mustn't have been prebuying
you mustn't have been prebuying
he mustn't have been prebuying
we mustn't have been prebuying
you mustn't have been prebuying
they mustn't have been prebuying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prebuy?
must you prebuy?
must he prebuy?
must we prebuy?
must you prebuy?
must they prebuy? 	must I be prebuying?
must you be prebuying?
must he be prebuying?
must we be prebuying?
must you be prebuying?
must they be prebuying? 	must I have prebought?
must you have prebought?
must he have prebought?
must we have prebought?
must you have prebought?
must they have prebought? 	must I have been prebuying?
must you have been prebuying?
must he have been prebuying?
must we have been prebuying?
must you have been prebuying?
must they have been prebuying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prebuy?
mustn't you prebuy?
mustn't he prebuy?
mustn't we prebuy?
mustn't you prebuy?
mustn't they prebuy? 	mustn't I be prebuying?
mustn't you be prebuying?
mustn't he be prebuying?
mustn't we be prebuying?
mustn't you be prebuying?
mustn't they be prebuying? 	mustn't I have prebought?
mustn't you have prebought?
mustn't he have prebought?
mustn't we have prebought?
mustn't you have prebought?
mustn't they have prebought? 	mustn't I have been prebuying?
mustn't you have been prebuying?
mustn't he have been prebuying?
mustn't we have been prebuying?
mustn't you have been prebuying?
mustn't they have been prebuying?