must carburize
Regular verb: carburize - carburized- carburized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must carburize
you must carburize
she must carburize
we must carburize
you must carburize
they must carburize 	I must be carburizing
you must be carburizing
she must be carburizing
we must be carburizing
you must be carburizing
they must be carburizing	I must have carburized
you must have carburized
she must have carburized
we must have carburized
you must have carburized
they must have carburized	I must have been carburizing
you must have been carburizing
she must have been carburizing
we must have been carburizing
you must have been carburizing
they must have been carburizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't carburize
you mustn't carburize
she mustn't carburize
we mustn't carburize
you mustn't carburize
they mustn't carburize 	I mustn't be carburizing
you mustn't be carburizing
she mustn't be carburizing
we mustn't be carburizing
you mustn't be carburizing
they mustn't be carburizing	I mustn't have carburized
you mustn't have carburized
she mustn't have carburized
we mustn't have carburized
you mustn't have carburized
they mustn't have carburized	I mustn't have been carburizing
you mustn't have been carburizing
she mustn't have been carburizing
we mustn't have been carburizing
you mustn't have been carburizing
they mustn't have been carburizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I carburize?
must you carburize?
must she carburize?
must we carburize?
must you carburize?
must they carburize? 	must I be carburizing?
must you be carburizing?
must she be carburizing?
must we be carburizing?
must you be carburizing?
must they be carburizing? 	must I have carburized?
must you have carburized?
must she have carburized?
must we have carburized?
must you have carburized?
must they have carburized? 	must I have been carburizing?
must you have been carburizing?
must she have been carburizing?
must we have been carburizing?
must you have been carburizing?
must they have been carburizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I carburize?
mustn't you carburize?
mustn't she carburize?
mustn't we carburize?
mustn't you carburize?
mustn't they carburize? 	mustn't I be carburizing?
mustn't you be carburizing?
mustn't she be carburizing?
mustn't we be carburizing?
mustn't you be carburizing?
mustn't they be carburizing? 	mustn't I have carburized?
mustn't you have carburized?
mustn't she have carburized?
mustn't we have carburized?
mustn't you have carburized?
mustn't they have carburized? 	mustn't I have been carburizing?
mustn't you have been carburizing?
mustn't she have been carburizing?
mustn't we have been carburizing?
mustn't you have been carburizing?
mustn't they have been carburizing?