must ultrafilter
Regular verb: ultrafilter - ultrafiltered- ultrafiltered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ultrafilter
you must ultrafilter
he must ultrafilter
we must ultrafilter
you must ultrafilter
they must ultrafilter 	I must be ultrafiltering
you must be ultrafiltering
he must be ultrafiltering
we must be ultrafiltering
you must be ultrafiltering
they must be ultrafiltering	I must have ultrafiltered
you must have ultrafiltered
he must have ultrafiltered
we must have ultrafiltered
you must have ultrafiltered
they must have ultrafiltered	I must have been ultrafiltering
you must have been ultrafiltering
he must have been ultrafiltering
we must have been ultrafiltering
you must have been ultrafiltering
they must have been ultrafiltering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not ultrafilter
you must not ultrafilter
he must not ultrafilter
we must not ultrafilter
you must not ultrafilter
they must not ultrafilter 	I must not be ultrafiltering
you must not be ultrafiltering
he must not be ultrafiltering
we must not be ultrafiltering
you must not be ultrafiltering
they must not be ultrafiltering	I must not have ultrafiltered
you must not have ultrafiltered
he must not have ultrafiltered
we must not have ultrafiltered
you must not have ultrafiltered
they must not have ultrafiltered	I must not have been ultrafiltering
you must not have been ultrafiltering
he must not have been ultrafiltering
we must not have been ultrafiltering
you must not have been ultrafiltering
they must not have been ultrafiltering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I ultrafilter?
must you ultrafilter?
must he ultrafilter?
must we ultrafilter?
must you ultrafilter?
must they ultrafilter? 	must I be ultrafiltering?
must you be ultrafiltering?
must he be ultrafiltering?
must we be ultrafiltering?
must you be ultrafiltering?
must they be ultrafiltering? 	must I have ultrafiltered?
must you have ultrafiltered?
must he have ultrafiltered?
must we have ultrafiltered?
must you have ultrafiltered?
must they have ultrafiltered? 	must I have been ultrafiltering?
must you have been ultrafiltering?
must he have been ultrafiltering?
must we have been ultrafiltering?
must you have been ultrafiltering?
must they have been ultrafiltering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not ultrafilter?
must you not ultrafilter?
must he not ultrafilter?
must we not ultrafilter?
must you not ultrafilter?
must they not ultrafilter? 	must I not be ultrafiltering?
must you not be ultrafiltering?
must he not be ultrafiltering?
must we not be ultrafiltering?
must you not be ultrafiltering?
must they not be ultrafiltering? 	must I not have ultrafiltered?
must you not have ultrafiltered?
must he not have ultrafiltered?
must we not have ultrafiltered?
must you not have ultrafiltered?
must they not have ultrafiltered? 	must I not have been ultrafiltering?
must you not have been ultrafiltering?
must he not have been ultrafiltering?
must we not have been ultrafiltering?
must you not have been ultrafiltering?
must they not have been ultrafiltering?