must demagnetise
Regular verb: demagnetise - demagnetised- demagnetised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must demagnetise
you must demagnetise
she must demagnetise
we must demagnetise
you must demagnetise
they must demagnetise 	I must be demagnetising
you must be demagnetising
she must be demagnetising
we must be demagnetising
you must be demagnetising
they must be demagnetising	I must have demagnetised
you must have demagnetised
she must have demagnetised
we must have demagnetised
you must have demagnetised
they must have demagnetised	I must have been demagnetising
you must have been demagnetising
she must have been demagnetising
we must have been demagnetising
you must have been demagnetising
they must have been demagnetising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't demagnetise
you mustn't demagnetise
she mustn't demagnetise
we mustn't demagnetise
you mustn't demagnetise
they mustn't demagnetise 	I mustn't be demagnetising
you mustn't be demagnetising
she mustn't be demagnetising
we mustn't be demagnetising
you mustn't be demagnetising
they mustn't be demagnetising	I mustn't have demagnetised
you mustn't have demagnetised
she mustn't have demagnetised
we mustn't have demagnetised
you mustn't have demagnetised
they mustn't have demagnetised	I mustn't have been demagnetising
you mustn't have been demagnetising
she mustn't have been demagnetising
we mustn't have been demagnetising
you mustn't have been demagnetising
they mustn't have been demagnetising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I demagnetise?
must you demagnetise?
must she demagnetise?
must we demagnetise?
must you demagnetise?
must they demagnetise? 	must I be demagnetising?
must you be demagnetising?
must she be demagnetising?
must we be demagnetising?
must you be demagnetising?
must they be demagnetising? 	must I have demagnetised?
must you have demagnetised?
must she have demagnetised?
must we have demagnetised?
must you have demagnetised?
must they have demagnetised? 	must I have been demagnetising?
must you have been demagnetising?
must she have been demagnetising?
must we have been demagnetising?
must you have been demagnetising?
must they have been demagnetising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I demagnetise?
mustn't you demagnetise?
mustn't she demagnetise?
mustn't we demagnetise?
mustn't you demagnetise?
mustn't they demagnetise? 	mustn't I be demagnetising?
mustn't you be demagnetising?
mustn't she be demagnetising?
mustn't we be demagnetising?
mustn't you be demagnetising?
mustn't they be demagnetising? 	mustn't I have demagnetised?
mustn't you have demagnetised?
mustn't she have demagnetised?
mustn't we have demagnetised?
mustn't you have demagnetised?
mustn't they have demagnetised? 	mustn't I have been demagnetising?
mustn't you have been demagnetising?
mustn't she have been demagnetising?
mustn't we have been demagnetising?
mustn't you have been demagnetising?
mustn't they have been demagnetising?