could concretise
Regular verb: concretise - concretised- concretised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could concretise
you could concretise
he could concretise
we could concretise
you could concretise
they could concretise 	I could be concretising
you could be concretising
he could be concretising
we could be concretising
you could be concretising
they could be concretising	I could have concretised
you could have concretised
he could have concretised
we could have concretised
you could have concretised
they could have concretised	I could have been concretising
you could have been concretising
he could have been concretising
we could have been concretising
you could have been concretising
they could have been concretising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't concretise
you couldn't concretise
he couldn't concretise
we couldn't concretise
you couldn't concretise
they couldn't concretise 	I couldn't be concretising
you couldn't be concretising
he couldn't be concretising
we couldn't be concretising
you couldn't be concretising
they couldn't be concretising	I couldn't have concretised
you couldn't have concretised
he couldn't have concretised
we couldn't have concretised
you couldn't have concretised
they couldn't have concretised	I couldn't have been concretising
you couldn't have been concretising
he couldn't have been concretising
we couldn't have been concretising
you couldn't have been concretising
they couldn't have been concretising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I concretise?
could you concretise?
could he concretise?
could we concretise?
could you concretise?
could they concretise? 	could I be concretising?
could you be concretising?
could he be concretising?
could we be concretising?
could you be concretising?
could they be concretising? 	could I have concretised?
could you have concretised?
could he have concretised?
could we have concretised?
could you have concretised?
could they have concretised? 	could I have been concretising?
could you have been concretising?
could he have been concretising?
could we have been concretising?
could you have been concretising?
could they have been concretising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I concretise?
couldn't you concretise?
couldn't he concretise?
couldn't we concretise?
couldn't you concretise?
couldn't they concretise? 	couldn't I be concretising?
couldn't you be concretising?
couldn't he be concretising?
couldn't we be concretising?
couldn't you be concretising?
couldn't they be concretising? 	couldn't I have concretised?
couldn't you have concretised?
couldn't he have concretised?
couldn't we have concretised?
couldn't you have concretised?
couldn't they have concretised? 	couldn't I have been concretising?
couldn't you have been concretising?
couldn't he have been concretising?
couldn't we have been concretising?
couldn't you have been concretising?
couldn't they have been concretising?