could synchronise
Verbo regular: synchronise - synchronised- synchronised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could synchronise
you could synchronise
he could synchronise
we could synchronise
you could synchronise
they could synchronise 	I could be synchronising
you could be synchronising
he could be synchronising
we could be synchronising
you could be synchronising
they could be synchronising	I could have synchronised
you could have synchronised
he could have synchronised
we could have synchronised
you could have synchronised
they could have synchronised	I could have been synchronising
you could have been synchronising
he could have been synchronising
we could have been synchronising
you could have been synchronising
they could have been synchronising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not synchronise
you could not synchronise
he could not synchronise
we could not synchronise
you could not synchronise
they could not synchronise 	I could not be synchronising
you could not be synchronising
he could not be synchronising
we could not be synchronising
you could not be synchronising
they could not be synchronising	I could not have synchronised
you could not have synchronised
he could not have synchronised
we could not have synchronised
you could not have synchronised
they could not have synchronised	I could not have been synchronising
you could not have been synchronising
he could not have been synchronising
we could not have been synchronising
you could not have been synchronising
they could not have been synchronising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I synchronise?
could you synchronise?
could he synchronise?
could we synchronise?
could you synchronise?
could they synchronise? 	could I be synchronising?
could you be synchronising?
could he be synchronising?
could we be synchronising?
could you be synchronising?
could they be synchronising? 	could I have synchronised?
could you have synchronised?
could he have synchronised?
could we have synchronised?
could you have synchronised?
could they have synchronised? 	could I have been synchronising?
could you have been synchronising?
could he have been synchronising?
could we have been synchronising?
could you have been synchronising?
could they have been synchronising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not synchronise?
could you not synchronise?
could he not synchronise?
could we not synchronise?
could you not synchronise?
could they not synchronise? 	could I not be synchronising?
could you not be synchronising?
could he not be synchronising?
could we not be synchronising?
could you not be synchronising?
could they not be synchronising? 	could I not have synchronised?
could you not have synchronised?
could he not have synchronised?
could we not have synchronised?
could you not have synchronised?
could they not have synchronised? 	could I not have been synchronising?
could you not have been synchronising?
could he not have been synchronising?
could we not have been synchronising?
could you not have been synchronising?
could they not have been synchronising?