English verb conjugation
MUST DECOLOURISE

Regular verb: decolourise - decolourised - decolourised

Affirmation

Simple form	V-ing form
I must decolourise you must decolourise he must decolourise we must decolourise you must decolourise they must decolourise	I must be decolourising you must be decolourising he must be decolourising we must be decolourising you must be decolourising they must be decolourising
Perfect	V-ing perfect
I must have decolourised you must have decolourised he 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 he must have been decolourising we must have been decolourising you must have been decolourising they must have been decolourising

Negation

Simple form	V-ing form
I mustn't decolourise you mustn't decolourise he 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 he mustn't be decolourising we mustn't be decolourising you mustn't be decolourising they mustn't be decolourising
Perfect	V-ing perfect
I mustn't have decolourised you mustn't have decolourised he 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 he mustn't have been decolourising we mustn't have been decolourising you mustn't have been decolourising they mustn't have been decolourising

Interrogative form

Simple form	V-ing form
must I decolourise? must you decolourise? must he decolourise? must we decolourise? must you decolourise? must they decolourise?	must I be decolourising? must you be decolourising? must he be decolourising? must we be decolourising? must you be decolourising? must they be decolourising?
Perfect	V-ing perfect
must I have decolourised? must you have decolourised? must he 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 he have been decolourising? must we have been decolourising? must you have been decolourising? must they have been decolourising?

Interro-negative form

Simple form	V-ing form
mustn't I decolourise? mustn't you decolourise? mustn't he 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 he be decolourising? mustn't we be decolourising? mustn't you be decolourising? mustn't they be decolourising?
Perfect	V-ing perfect
mustn't I have decolourised? mustn't you have decolourised? mustn't he 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 he have been decolourising? mustn't we have been decolourising? mustn't you have been decolourising? mustn't they have been decolourising?