must decolourise
Verbe régulier : decolourise - decolourised- decolourised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must decolourise
you must decolourise
she must decolourise
we must decolourise
you must decolourise
they must decolourise 	I must be decolourising
you must be decolourising
she must be decolourising
we must be decolourising
you must be decolourising
they must be decolourising	I must have decolourised
you must have decolourised
she must have decolourised
we must have decolourised
you must have decolourised
they must have decolourised	I must have been decolourising
you must have been decolourising
she must have been decolourising
we must have been decolourising
you must have been decolourising
they must have been decolourising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't decolourise
you mustn't decolourise
she mustn't decolourise
we mustn't decolourise
you mustn't decolourise
they mustn't decolourise 	I mustn't be decolourising
you mustn't be decolourising
she mustn't be decolourising
we mustn't be decolourising
you mustn't be decolourising
they mustn't be decolourising	I mustn't have decolourised
you mustn't have decolourised
she mustn't have decolourised
we mustn't have decolourised
you mustn't have decolourised
they mustn't have decolourised	I mustn't have been decolourising
you mustn't have been decolourising
she mustn't have been decolourising
we mustn't have been decolourising
you mustn't have been decolourising
they mustn't have been decolourising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I decolourise?
must you decolourise?
must she decolourise?
must we decolourise?
must you decolourise?
must they decolourise? 	must I be decolourising?
must you be decolourising?
must she be decolourising?
must we be decolourising?
must you be decolourising?
must they be decolourising? 	must I have decolourised?
must you have decolourised?
must she have decolourised?
must we have decolourised?
must you have decolourised?
must they have decolourised? 	must I have been decolourising?
must you have been decolourising?
must she have been decolourising?
must we have been decolourising?
must you have been decolourising?
must they have been decolourising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I decolourise?
mustn't you decolourise?
mustn't she decolourise?
mustn't we decolourise?
mustn't you decolourise?
mustn't they decolourise? 	mustn't I be decolourising?
mustn't you be decolourising?
mustn't she be decolourising?
mustn't we be decolourising?
mustn't you be decolourising?
mustn't they be decolourising? 	mustn't I have decolourised?
mustn't you have decolourised?
mustn't she have decolourised?
mustn't we have decolourised?
mustn't you have decolourised?
mustn't they have decolourised? 	mustn't I have been decolourising?
mustn't you have been decolourising?
mustn't she have been decolourising?
mustn't we have been decolourising?
mustn't you have been decolourising?
mustn't they have been decolourising?