must diminish
Regular verb: diminish - diminished- diminished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must diminish
you must diminish
she must diminish
we must diminish
you must diminish
they must diminish 	I must be diminishing
you must be diminishing
she must be diminishing
we must be diminishing
you must be diminishing
they must be diminishing	I must have diminished
you must have diminished
she must have diminished
we must have diminished
you must have diminished
they must have diminished	I must have been diminishing
you must have been diminishing
she must have been diminishing
we must have been diminishing
you must have been diminishing
they must have been diminishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't diminish
you mustn't diminish
she mustn't diminish
we mustn't diminish
you mustn't diminish
they mustn't diminish 	I mustn't be diminishing
you mustn't be diminishing
she mustn't be diminishing
we mustn't be diminishing
you mustn't be diminishing
they mustn't be diminishing	I mustn't have diminished
you mustn't have diminished
she mustn't have diminished
we mustn't have diminished
you mustn't have diminished
they mustn't have diminished	I mustn't have been diminishing
you mustn't have been diminishing
she mustn't have been diminishing
we mustn't have been diminishing
you mustn't have been diminishing
they mustn't have been diminishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I diminish?
must you diminish?
must she diminish?
must we diminish?
must you diminish?
must they diminish? 	must I be diminishing?
must you be diminishing?
must she be diminishing?
must we be diminishing?
must you be diminishing?
must they be diminishing? 	must I have diminished?
must you have diminished?
must she have diminished?
must we have diminished?
must you have diminished?
must they have diminished? 	must I have been diminishing?
must you have been diminishing?
must she have been diminishing?
must we have been diminishing?
must you have been diminishing?
must they have been diminishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I diminish?
mustn't you diminish?
mustn't she diminish?
mustn't we diminish?
mustn't you diminish?
mustn't they diminish? 	mustn't I be diminishing?
mustn't you be diminishing?
mustn't she be diminishing?
mustn't we be diminishing?
mustn't you be diminishing?
mustn't they be diminishing? 	mustn't I have diminished?
mustn't you have diminished?
mustn't she have diminished?
mustn't we have diminished?
mustn't you have diminished?
mustn't they have diminished? 	mustn't I have been diminishing?
mustn't you have been diminishing?
mustn't she have been diminishing?
mustn't we have been diminishing?
mustn't you have been diminishing?
mustn't they have been diminishing?