must serotype
Regular verb: serotype - serotyped- serotyped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must serotype
you must serotype
she must serotype
we must serotype
you must serotype
they must serotype 	I must be serotyping
you must be serotyping
she must be serotyping
we must be serotyping
you must be serotyping
they must be serotyping	I must have serotyped
you must have serotyped
she must have serotyped
we must have serotyped
you must have serotyped
they must have serotyped	I must have been serotyping
you must have been serotyping
she must have been serotyping
we must have been serotyping
you must have been serotyping
they must have been serotyping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not serotype
you must not serotype
she must not serotype
we must not serotype
you must not serotype
they must not serotype 	I must not be serotyping
you must not be serotyping
she must not be serotyping
we must not be serotyping
you must not be serotyping
they must not be serotyping	I must not have serotyped
you must not have serotyped
she must not have serotyped
we must not have serotyped
you must not have serotyped
they must not have serotyped	I must not have been serotyping
you must not have been serotyping
she must not have been serotyping
we must not have been serotyping
you must not have been serotyping
they must not have been serotyping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I serotype?
must you serotype?
must she serotype?
must we serotype?
must you serotype?
must they serotype? 	must I be serotyping?
must you be serotyping?
must she be serotyping?
must we be serotyping?
must you be serotyping?
must they be serotyping? 	must I have serotyped?
must you have serotyped?
must she have serotyped?
must we have serotyped?
must you have serotyped?
must they have serotyped? 	must I have been serotyping?
must you have been serotyping?
must she have been serotyping?
must we have been serotyping?
must you have been serotyping?
must they have been serotyping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not serotype?
must you not serotype?
must she not serotype?
must we not serotype?
must you not serotype?
must they not serotype? 	must I not be serotyping?
must you not be serotyping?
must she not be serotyping?
must we not be serotyping?
must you not be serotyping?
must they not be serotyping? 	must I not have serotyped?
must you not have serotyped?
must she not have serotyped?
must we not have serotyped?
must you not have serotyped?
must they not have serotyped? 	must I not have been serotyping?
must you not have been serotyping?
must she not have been serotyping?
must we not have been serotyping?
must you not have been serotyping?
must they not have been serotyping?