must circumnavigate
Regular verb: circumnavigate - circumnavigated- circumnavigated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must circumnavigate
you must circumnavigate
he must circumnavigate
we must circumnavigate
you must circumnavigate
they must circumnavigate 	I must be circumnavigating
you must be circumnavigating
he must be circumnavigating
we must be circumnavigating
you must be circumnavigating
they must be circumnavigating	I must have circumnavigated
you must have circumnavigated
he must have circumnavigated
we must have circumnavigated
you must have circumnavigated
they must have circumnavigated	I must have been circumnavigating
you must have been circumnavigating
he must have been circumnavigating
we must have been circumnavigating
you must have been circumnavigating
they must have been circumnavigating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't circumnavigate
you mustn't circumnavigate
he mustn't circumnavigate
we mustn't circumnavigate
you mustn't circumnavigate
they mustn't circumnavigate 	I mustn't be circumnavigating
you mustn't be circumnavigating
he mustn't be circumnavigating
we mustn't be circumnavigating
you mustn't be circumnavigating
they mustn't be circumnavigating	I mustn't have circumnavigated
you mustn't have circumnavigated
he mustn't have circumnavigated
we mustn't have circumnavigated
you mustn't have circumnavigated
they mustn't have circumnavigated	I mustn't have been circumnavigating
you mustn't have been circumnavigating
he mustn't have been circumnavigating
we mustn't have been circumnavigating
you mustn't have been circumnavigating
they mustn't have been circumnavigating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I circumnavigate?
must you circumnavigate?
must he circumnavigate?
must we circumnavigate?
must you circumnavigate?
must they circumnavigate? 	must I be circumnavigating?
must you be circumnavigating?
must he be circumnavigating?
must we be circumnavigating?
must you be circumnavigating?
must they be circumnavigating? 	must I have circumnavigated?
must you have circumnavigated?
must he have circumnavigated?
must we have circumnavigated?
must you have circumnavigated?
must they have circumnavigated? 	must I have been circumnavigating?
must you have been circumnavigating?
must he have been circumnavigating?
must we have been circumnavigating?
must you have been circumnavigating?
must they have been circumnavigating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I circumnavigate?
mustn't you circumnavigate?
mustn't he circumnavigate?
mustn't we circumnavigate?
mustn't you circumnavigate?
mustn't they circumnavigate? 	mustn't I be circumnavigating?
mustn't you be circumnavigating?
mustn't he be circumnavigating?
mustn't we be circumnavigating?
mustn't you be circumnavigating?
mustn't they be circumnavigating? 	mustn't I have circumnavigated?
mustn't you have circumnavigated?
mustn't he have circumnavigated?
mustn't we have circumnavigated?
mustn't you have circumnavigated?
mustn't they have circumnavigated? 	mustn't I have been circumnavigating?
mustn't you have been circumnavigating?
mustn't he have been circumnavigating?
mustn't we have been circumnavigating?
mustn't you have been circumnavigating?
mustn't they have been circumnavigating?