could polymerise
Regular verb: polymerise - polymerised- polymerised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could polymerise
you could polymerise
he could polymerise
we could polymerise
you could polymerise
they could polymerise 	I could be polymerising
you could be polymerising
he could be polymerising
we could be polymerising
you could be polymerising
they could be polymerising	I could have polymerised
you could have polymerised
he could have polymerised
we could have polymerised
you could have polymerised
they could have polymerised	I could have been polymerising
you could have been polymerising
he could have been polymerising
we could have been polymerising
you could have been polymerising
they could have been polymerising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not polymerise
you could not polymerise
he could not polymerise
we could not polymerise
you could not polymerise
they could not polymerise 	I could not be polymerising
you could not be polymerising
he could not be polymerising
we could not be polymerising
you could not be polymerising
they could not be polymerising	I could not have polymerised
you could not have polymerised
he could not have polymerised
we could not have polymerised
you could not have polymerised
they could not have polymerised	I could not have been polymerising
you could not have been polymerising
he could not have been polymerising
we could not have been polymerising
you could not have been polymerising
they could not have been polymerising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I polymerise?
could you polymerise?
could he polymerise?
could we polymerise?
could you polymerise?
could they polymerise? 	could I be polymerising?
could you be polymerising?
could he be polymerising?
could we be polymerising?
could you be polymerising?
could they be polymerising? 	could I have polymerised?
could you have polymerised?
could he have polymerised?
could we have polymerised?
could you have polymerised?
could they have polymerised? 	could I have been polymerising?
could you have been polymerising?
could he have been polymerising?
could we have been polymerising?
could you have been polymerising?
could they have been polymerising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not polymerise?
could you not polymerise?
could he not polymerise?
could we not polymerise?
could you not polymerise?
could they not polymerise? 	could I not be polymerising?
could you not be polymerising?
could he not be polymerising?
could we not be polymerising?
could you not be polymerising?
could they not be polymerising? 	could I not have polymerised?
could you not have polymerised?
could he not have polymerised?
could we not have polymerised?
could you not have polymerised?
could they not have polymerised? 	could I not have been polymerising?
could you not have been polymerising?
could he not have been polymerising?
could we not have been polymerising?
could you not have been polymerising?
could they not have been polymerising?