must decimalise
Regular verb: decimalise - decimalised- decimalised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must decimalise
you must decimalise
he must decimalise
we must decimalise
you must decimalise
they must decimalise 	I must be decimalising
you must be decimalising
he must be decimalising
we must be decimalising
you must be decimalising
they must be decimalising	I must have decimalised
you must have decimalised
he must have decimalised
we must have decimalised
you must have decimalised
they must have decimalised	I must have been decimalising
you must have been decimalising
he must have been decimalising
we must have been decimalising
you must have been decimalising
they must have been decimalising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't decimalise
you mustn't decimalise
he mustn't decimalise
we mustn't decimalise
you mustn't decimalise
they mustn't decimalise 	I mustn't be decimalising
you mustn't be decimalising
he mustn't be decimalising
we mustn't be decimalising
you mustn't be decimalising
they mustn't be decimalising	I mustn't have decimalised
you mustn't have decimalised
he mustn't have decimalised
we mustn't have decimalised
you mustn't have decimalised
they mustn't have decimalised	I mustn't have been decimalising
you mustn't have been decimalising
he mustn't have been decimalising
we mustn't have been decimalising
you mustn't have been decimalising
they mustn't have been decimalising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I decimalise?
must you decimalise?
must he decimalise?
must we decimalise?
must you decimalise?
must they decimalise? 	must I be decimalising?
must you be decimalising?
must he be decimalising?
must we be decimalising?
must you be decimalising?
must they be decimalising? 	must I have decimalised?
must you have decimalised?
must he have decimalised?
must we have decimalised?
must you have decimalised?
must they have decimalised? 	must I have been decimalising?
must you have been decimalising?
must he have been decimalising?
must we have been decimalising?
must you have been decimalising?
must they have been decimalising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I decimalise?
mustn't you decimalise?
mustn't he decimalise?
mustn't we decimalise?
mustn't you decimalise?
mustn't they decimalise? 	mustn't I be decimalising?
mustn't you be decimalising?
mustn't he be decimalising?
mustn't we be decimalising?
mustn't you be decimalising?
mustn't they be decimalising? 	mustn't I have decimalised?
mustn't you have decimalised?
mustn't he have decimalised?
mustn't we have decimalised?
mustn't you have decimalised?
mustn't they have decimalised? 	mustn't I have been decimalising?
mustn't you have been decimalising?
mustn't he have been decimalising?
mustn't we have been decimalising?
mustn't you have been decimalising?
mustn't they have been decimalising?