could decolourise
Verbe régulier : decolourise - decolourised- decolourised

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

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

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

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