must forget
Irregular verb: forget - forgot- forgotten

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must forget
you must forget
he must forget
we must forget
you must forget
they must forget 	I must be forgetting
you must be forgetting
he must be forgetting
we must be forgetting
you must be forgetting
they must be forgetting	I must have forgotten
you must have forgotten
he must have forgotten
we must have forgotten
you must have forgotten
they must have forgotten	I must have been forgetting
you must have been forgetting
he must have been forgetting
we must have been forgetting
you must have been forgetting
they must have been forgetting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not forget
you must not forget
he must not forget
we must not forget
you must not forget
they must not forget 	I must not be forgetting
you must not be forgetting
he must not be forgetting
we must not be forgetting
you must not be forgetting
they must not be forgetting	I must not have forgotten
you must not have forgotten
he must not have forgotten
we must not have forgotten
you must not have forgotten
they must not have forgotten	I must not have been forgetting
you must not have been forgetting
he must not have been forgetting
we must not have been forgetting
you must not have been forgetting
they must not have been forgetting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I forget?
must you forget?
must he forget?
must we forget?
must you forget?
must they forget? 	must I be forgetting?
must you be forgetting?
must he be forgetting?
must we be forgetting?
must you be forgetting?
must they be forgetting? 	must I have forgotten?
must you have forgotten?
must he have forgotten?
must we have forgotten?
must you have forgotten?
must they have forgotten? 	must I have been forgetting?
must you have been forgetting?
must he have been forgetting?
must we have been forgetting?
must you have been forgetting?
must they have been forgetting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not forget?
must you not forget?
must he not forget?
must we not forget?
must you not forget?
must they not forget? 	must I not be forgetting?
must you not be forgetting?
must he not be forgetting?
must we not be forgetting?
must you not be forgetting?
must they not be forgetting? 	must I not have forgotten?
must you not have forgotten?
must he not have forgotten?
must we not have forgotten?
must you not have forgotten?
must they not have forgotten? 	must I not have been forgetting?
must you not have been forgetting?
must he not have been forgetting?
must we not have been forgetting?
must you not have been forgetting?
must they not have been forgetting?