must detect
Regular verb: detect - detected- detected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must detect
you must detect
he must detect
we must detect
you must detect
they must detect 	I must be detecting
you must be detecting
he must be detecting
we must be detecting
you must be detecting
they must be detecting	I must have detected
you must have detected
he must have detected
we must have detected
you must have detected
they must have detected	I must have been detecting
you must have been detecting
he must have been detecting
we must have been detecting
you must have been detecting
they must have been detecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't detect
you mustn't detect
he mustn't detect
we mustn't detect
you mustn't detect
they mustn't detect 	I mustn't be detecting
you mustn't be detecting
he mustn't be detecting
we mustn't be detecting
you mustn't be detecting
they mustn't be detecting	I mustn't have detected
you mustn't have detected
he mustn't have detected
we mustn't have detected
you mustn't have detected
they mustn't have detected	I mustn't have been detecting
you mustn't have been detecting
he mustn't have been detecting
we mustn't have been detecting
you mustn't have been detecting
they mustn't have been detecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I detect?
must you detect?
must he detect?
must we detect?
must you detect?
must they detect? 	must I be detecting?
must you be detecting?
must he be detecting?
must we be detecting?
must you be detecting?
must they be detecting? 	must I have detected?
must you have detected?
must he have detected?
must we have detected?
must you have detected?
must they have detected? 	must I have been detecting?
must you have been detecting?
must he have been detecting?
must we have been detecting?
must you have been detecting?
must they have been detecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I detect?
mustn't you detect?
mustn't he detect?
mustn't we detect?
mustn't you detect?
mustn't they detect? 	mustn't I be detecting?
mustn't you be detecting?
mustn't he be detecting?
mustn't we be detecting?
mustn't you be detecting?
mustn't they be detecting? 	mustn't I have detected?
mustn't you have detected?
mustn't he have detected?
mustn't we have detected?
mustn't you have detected?
mustn't they have detected? 	mustn't I have been detecting?
mustn't you have been detecting?
mustn't he have been detecting?
mustn't we have been detecting?
mustn't you have been detecting?
mustn't they have been detecting?