should decolourise
Regular verb: decolourise - decolourised- decolourised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd decolourise
you'd decolourise
he'd decolourise
we'd decolourise
you'd decolourise
they'd decolourise 	I'd be decolourising
you'd be decolourising
he'd be decolourising
we'd be decolourising
you'd be decolourising
they'd be decolourising	I should've decolourised
you should've decolourised
he should've decolourised
we should've decolourised
you should've decolourised
they should've decolourised	I should've been decolourising
you should've been decolourising
he should've been decolourising
we should've been decolourising
you should've been decolourising
they should've been decolourising	

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

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

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