must deterge
Regular verb: deterge - deterged- deterged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must deterge
you must deterge
he must deterge
we must deterge
you must deterge
they must deterge 	I must be deterging
you must be deterging
he must be deterging
we must be deterging
you must be deterging
they must be deterging	I must have deterged
you must have deterged
he must have deterged
we must have deterged
you must have deterged
they must have deterged	I must have been deterging
you must have been deterging
he must have been deterging
we must have been deterging
you must have been deterging
they must have been deterging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not deterge
you must not deterge
he must not deterge
we must not deterge
you must not deterge
they must not deterge 	I must not be deterging
you must not be deterging
he must not be deterging
we must not be deterging
you must not be deterging
they must not be deterging	I must not have deterged
you must not have deterged
he must not have deterged
we must not have deterged
you must not have deterged
they must not have deterged	I must not have been deterging
you must not have been deterging
he must not have been deterging
we must not have been deterging
you must not have been deterging
they must not have been deterging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I deterge?
must you deterge?
must he deterge?
must we deterge?
must you deterge?
must they deterge? 	must I be deterging?
must you be deterging?
must he be deterging?
must we be deterging?
must you be deterging?
must they be deterging? 	must I have deterged?
must you have deterged?
must he have deterged?
must we have deterged?
must you have deterged?
must they have deterged? 	must I have been deterging?
must you have been deterging?
must he have been deterging?
must we have been deterging?
must you have been deterging?
must they have been deterging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not deterge?
must you not deterge?
must he not deterge?
must we not deterge?
must you not deterge?
must they not deterge? 	must I not be deterging?
must you not be deterging?
must he not be deterging?
must we not be deterging?
must you not be deterging?
must they not be deterging? 	must I not have deterged?
must you not have deterged?
must he not have deterged?
must we not have deterged?
must you not have deterged?
must they not have deterged? 	must I not have been deterging?
must you not have been deterging?
must he not have been deterging?
must we not have been deterging?
must you not have been deterging?
must they not have been deterging?