must carburise
Regular verb: carburise - carburised- carburised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must carburise
you must carburise
he must carburise
we must carburise
you must carburise
they must carburise 	I must be carburising
you must be carburising
he must be carburising
we must be carburising
you must be carburising
they must be carburising	I must have carburised
you must have carburised
he must have carburised
we must have carburised
you must have carburised
they must have carburised	I must have been carburising
you must have been carburising
he must have been carburising
we must have been carburising
you must have been carburising
they must have been carburising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't carburise
you mustn't carburise
he mustn't carburise
we mustn't carburise
you mustn't carburise
they mustn't carburise 	I mustn't be carburising
you mustn't be carburising
he mustn't be carburising
we mustn't be carburising
you mustn't be carburising
they mustn't be carburising	I mustn't have carburised
you mustn't have carburised
he mustn't have carburised
we mustn't have carburised
you mustn't have carburised
they mustn't have carburised	I mustn't have been carburising
you mustn't have been carburising
he mustn't have been carburising
we mustn't have been carburising
you mustn't have been carburising
they mustn't have been carburising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I carburise?
must you carburise?
must he carburise?
must we carburise?
must you carburise?
must they carburise? 	must I be carburising?
must you be carburising?
must he be carburising?
must we be carburising?
must you be carburising?
must they be carburising? 	must I have carburised?
must you have carburised?
must he have carburised?
must we have carburised?
must you have carburised?
must they have carburised? 	must I have been carburising?
must you have been carburising?
must he have been carburising?
must we have been carburising?
must you have been carburising?
must they have been carburising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I carburise?
mustn't you carburise?
mustn't he carburise?
mustn't we carburise?
mustn't you carburise?
mustn't they carburise? 	mustn't I be carburising?
mustn't you be carburising?
mustn't he be carburising?
mustn't we be carburising?
mustn't you be carburising?
mustn't they be carburising? 	mustn't I have carburised?
mustn't you have carburised?
mustn't he have carburised?
mustn't we have carburised?
mustn't you have carburised?
mustn't they have carburised? 	mustn't I have been carburising?
mustn't you have been carburising?
mustn't he have been carburising?
mustn't we have been carburising?
mustn't you have been carburising?
mustn't they have been carburising?