must prebuild
Irregular verb: prebuild - prebuilt- prebuilt

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prebuild
you must prebuild
he must prebuild
we must prebuild
you must prebuild
they must prebuild 	I must be prebuilding
you must be prebuilding
he must be prebuilding
we must be prebuilding
you must be prebuilding
they must be prebuilding	I must have prebuilt
you must have prebuilt
he must have prebuilt
we must have prebuilt
you must have prebuilt
they must have prebuilt	I must have been prebuilding
you must have been prebuilding
he must have been prebuilding
we must have been prebuilding
you must have been prebuilding
they must have been prebuilding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prebuild
you mustn't prebuild
he mustn't prebuild
we mustn't prebuild
you mustn't prebuild
they mustn't prebuild 	I mustn't be prebuilding
you mustn't be prebuilding
he mustn't be prebuilding
we mustn't be prebuilding
you mustn't be prebuilding
they mustn't be prebuilding	I mustn't have prebuilt
you mustn't have prebuilt
he mustn't have prebuilt
we mustn't have prebuilt
you mustn't have prebuilt
they mustn't have prebuilt	I mustn't have been prebuilding
you mustn't have been prebuilding
he mustn't have been prebuilding
we mustn't have been prebuilding
you mustn't have been prebuilding
they mustn't have been prebuilding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prebuild?
must you prebuild?
must he prebuild?
must we prebuild?
must you prebuild?
must they prebuild? 	must I be prebuilding?
must you be prebuilding?
must he be prebuilding?
must we be prebuilding?
must you be prebuilding?
must they be prebuilding? 	must I have prebuilt?
must you have prebuilt?
must he have prebuilt?
must we have prebuilt?
must you have prebuilt?
must they have prebuilt? 	must I have been prebuilding?
must you have been prebuilding?
must he have been prebuilding?
must we have been prebuilding?
must you have been prebuilding?
must they have been prebuilding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prebuild?
mustn't you prebuild?
mustn't he prebuild?
mustn't we prebuild?
mustn't you prebuild?
mustn't they prebuild? 	mustn't I be prebuilding?
mustn't you be prebuilding?
mustn't he be prebuilding?
mustn't we be prebuilding?
mustn't you be prebuilding?
mustn't they be prebuilding? 	mustn't I have prebuilt?
mustn't you have prebuilt?
mustn't he have prebuilt?
mustn't we have prebuilt?
mustn't you have prebuilt?
mustn't they have prebuilt? 	mustn't I have been prebuilding?
mustn't you have been prebuilding?
mustn't he have been prebuilding?
mustn't we have been prebuilding?
mustn't you have been prebuilding?
mustn't they have been prebuilding?