could plasticise
Regular verb: plasticise - plasticised- plasticised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could plasticise
you could plasticise
he could plasticise
we could plasticise
you could plasticise
they could plasticise 	I could be plasticising
you could be plasticising
he could be plasticising
we could be plasticising
you could be plasticising
they could be plasticising	I could have plasticised
you could have plasticised
he could have plasticised
we could have plasticised
you could have plasticised
they could have plasticised	I could have been plasticising
you could have been plasticising
he could have been plasticising
we could have been plasticising
you could have been plasticising
they could have been plasticising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't plasticise
you couldn't plasticise
he couldn't plasticise
we couldn't plasticise
you couldn't plasticise
they couldn't plasticise 	I couldn't be plasticising
you couldn't be plasticising
he couldn't be plasticising
we couldn't be plasticising
you couldn't be plasticising
they couldn't be plasticising	I couldn't have plasticised
you couldn't have plasticised
he couldn't have plasticised
we couldn't have plasticised
you couldn't have plasticised
they couldn't have plasticised	I couldn't have been plasticising
you couldn't have been plasticising
he couldn't have been plasticising
we couldn't have been plasticising
you couldn't have been plasticising
they couldn't have been plasticising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I plasticise?
could you plasticise?
could he plasticise?
could we plasticise?
could you plasticise?
could they plasticise? 	could I be plasticising?
could you be plasticising?
could he be plasticising?
could we be plasticising?
could you be plasticising?
could they be plasticising? 	could I have plasticised?
could you have plasticised?
could he have plasticised?
could we have plasticised?
could you have plasticised?
could they have plasticised? 	could I have been plasticising?
could you have been plasticising?
could he have been plasticising?
could we have been plasticising?
could you have been plasticising?
could they have been plasticising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I plasticise?
couldn't you plasticise?
couldn't he plasticise?
couldn't we plasticise?
couldn't you plasticise?
couldn't they plasticise? 	couldn't I be plasticising?
couldn't you be plasticising?
couldn't he be plasticising?
couldn't we be plasticising?
couldn't you be plasticising?
couldn't they be plasticising? 	couldn't I have plasticised?
couldn't you have plasticised?
couldn't he have plasticised?
couldn't we have plasticised?
couldn't you have plasticised?
couldn't they have plasticised? 	couldn't I have been plasticising?
couldn't you have been plasticising?
couldn't he have been plasticising?
couldn't we have been plasticising?
couldn't you have been plasticising?
couldn't they have been plasticising?