must reobserve
Regular verb: reobserve - reobserved- reobserved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must reobserve
you must reobserve
he must reobserve
we must reobserve
you must reobserve
they must reobserve 	I must be reobserving
you must be reobserving
he must be reobserving
we must be reobserving
you must be reobserving
they must be reobserving	I must have reobserved
you must have reobserved
he must have reobserved
we must have reobserved
you must have reobserved
they must have reobserved	I must have been reobserving
you must have been reobserving
he must have been reobserving
we must have been reobserving
you must have been reobserving
they must have been reobserving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not reobserve
you must not reobserve
he must not reobserve
we must not reobserve
you must not reobserve
they must not reobserve 	I must not be reobserving
you must not be reobserving
he must not be reobserving
we must not be reobserving
you must not be reobserving
they must not be reobserving	I must not have reobserved
you must not have reobserved
he must not have reobserved
we must not have reobserved
you must not have reobserved
they must not have reobserved	I must not have been reobserving
you must not have been reobserving
he must not have been reobserving
we must not have been reobserving
you must not have been reobserving
they must not have been reobserving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I reobserve?
must you reobserve?
must he reobserve?
must we reobserve?
must you reobserve?
must they reobserve? 	must I be reobserving?
must you be reobserving?
must he be reobserving?
must we be reobserving?
must you be reobserving?
must they be reobserving? 	must I have reobserved?
must you have reobserved?
must he have reobserved?
must we have reobserved?
must you have reobserved?
must they have reobserved? 	must I have been reobserving?
must you have been reobserving?
must he have been reobserving?
must we have been reobserving?
must you have been reobserving?
must they have been reobserving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not reobserve?
must you not reobserve?
must he not reobserve?
must we not reobserve?
must you not reobserve?
must they not reobserve? 	must I not be reobserving?
must you not be reobserving?
must he not be reobserving?
must we not be reobserving?
must you not be reobserving?
must they not be reobserving? 	must I not have reobserved?
must you not have reobserved?
must he not have reobserved?
must we not have reobserved?
must you not have reobserved?
must they not have reobserved? 	must I not have been reobserving?
must you not have been reobserving?
must he not have been reobserving?
must we not have been reobserving?
must you not have been reobserving?
must they not have been reobserving?