must inter
Regular verb: inter - interred- interred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must inter
you must inter
he must inter
we must inter
you must inter
they must inter 	I must be interring
you must be interring
he must be interring
we must be interring
you must be interring
they must be interring	I must have interred
you must have interred
he must have interred
we must have interred
you must have interred
they must have interred	I must have been interring
you must have been interring
he must have been interring
we must have been interring
you must have been interring
they must have been interring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not inter
you must not inter
he must not inter
we must not inter
you must not inter
they must not inter 	I must not be interring
you must not be interring
he must not be interring
we must not be interring
you must not be interring
they must not be interring	I must not have interred
you must not have interred
he must not have interred
we must not have interred
you must not have interred
they must not have interred	I must not have been interring
you must not have been interring
he must not have been interring
we must not have been interring
you must not have been interring
they must not have been interring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I inter?
must you inter?
must he inter?
must we inter?
must you inter?
must they inter? 	must I be interring?
must you be interring?
must he be interring?
must we be interring?
must you be interring?
must they be interring? 	must I have interred?
must you have interred?
must he have interred?
must we have interred?
must you have interred?
must they have interred? 	must I have been interring?
must you have been interring?
must he have been interring?
must we have been interring?
must you have been interring?
must they have been interring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not inter?
must you not inter?
must he not inter?
must we not inter?
must you not inter?
must they not inter? 	must I not be interring?
must you not be interring?
must he not be interring?
must we not be interring?
must you not be interring?
must they not be interring? 	must I not have interred?
must you not have interred?
must he not have interred?
must we not have interred?
must you not have interred?
must they not have interred? 	must I not have been interring?
must you not have been interring?
must he not have been interring?
must we not have been interring?
must you not have been interring?
must they not have been interring?