must carbonize
Regular verb: carbonize - carbonized- carbonized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must carbonize
you must carbonize
he must carbonize
we must carbonize
you must carbonize
they must carbonize 	I must be carbonizing
you must be carbonizing
he must be carbonizing
we must be carbonizing
you must be carbonizing
they must be carbonizing	I must have carbonized
you must have carbonized
he must have carbonized
we must have carbonized
you must have carbonized
they must have carbonized	I must have been carbonizing
you must have been carbonizing
he must have been carbonizing
we must have been carbonizing
you must have been carbonizing
they must have been carbonizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not carbonize
you must not carbonize
he must not carbonize
we must not carbonize
you must not carbonize
they must not carbonize 	I must not be carbonizing
you must not be carbonizing
he must not be carbonizing
we must not be carbonizing
you must not be carbonizing
they must not be carbonizing	I must not have carbonized
you must not have carbonized
he must not have carbonized
we must not have carbonized
you must not have carbonized
they must not have carbonized	I must not have been carbonizing
you must not have been carbonizing
he must not have been carbonizing
we must not have been carbonizing
you must not have been carbonizing
they must not have been carbonizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I carbonize?
must you carbonize?
must he carbonize?
must we carbonize?
must you carbonize?
must they carbonize? 	must I be carbonizing?
must you be carbonizing?
must he be carbonizing?
must we be carbonizing?
must you be carbonizing?
must they be carbonizing? 	must I have carbonized?
must you have carbonized?
must he have carbonized?
must we have carbonized?
must you have carbonized?
must they have carbonized? 	must I have been carbonizing?
must you have been carbonizing?
must he have been carbonizing?
must we have been carbonizing?
must you have been carbonizing?
must they have been carbonizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not carbonize?
must you not carbonize?
must he not carbonize?
must we not carbonize?
must you not carbonize?
must they not carbonize? 	must I not be carbonizing?
must you not be carbonizing?
must he not be carbonizing?
must we not be carbonizing?
must you not be carbonizing?
must they not be carbonizing? 	must I not have carbonized?
must you not have carbonized?
must he not have carbonized?
must we not have carbonized?
must you not have carbonized?
must they not have carbonized? 	must I not have been carbonizing?
must you not have been carbonizing?
must he not have been carbonizing?
must we not have been carbonizing?
must you not have been carbonizing?
must they not have been carbonizing?