could singularise
Verbo regular: singularise - singularised- singularised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could singularise
you could singularise
he could singularise
we could singularise
you could singularise
they could singularise 	I could be singularising
you could be singularising
he could be singularising
we could be singularising
you could be singularising
they could be singularising	I could have singularised
you could have singularised
he could have singularised
we could have singularised
you could have singularised
they could have singularised	I could have been singularising
you could have been singularising
he could have been singularising
we could have been singularising
you could have been singularising
they could have been singularising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't singularise
you couldn't singularise
he couldn't singularise
we couldn't singularise
you couldn't singularise
they couldn't singularise 	I couldn't be singularising
you couldn't be singularising
he couldn't be singularising
we couldn't be singularising
you couldn't be singularising
they couldn't be singularising	I couldn't have singularised
you couldn't have singularised
he couldn't have singularised
we couldn't have singularised
you couldn't have singularised
they couldn't have singularised	I couldn't have been singularising
you couldn't have been singularising
he couldn't have been singularising
we couldn't have been singularising
you couldn't have been singularising
they couldn't have been singularising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I singularise?
could you singularise?
could he singularise?
could we singularise?
could you singularise?
could they singularise? 	could I be singularising?
could you be singularising?
could he be singularising?
could we be singularising?
could you be singularising?
could they be singularising? 	could I have singularised?
could you have singularised?
could he have singularised?
could we have singularised?
could you have singularised?
could they have singularised? 	could I have been singularising?
could you have been singularising?
could he have been singularising?
could we have been singularising?
could you have been singularising?
could they have been singularising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I singularise?
couldn't you singularise?
couldn't he singularise?
couldn't we singularise?
couldn't you singularise?
couldn't they singularise? 	couldn't I be singularising?
couldn't you be singularising?
couldn't he be singularising?
couldn't we be singularising?
couldn't you be singularising?
couldn't they be singularising? 	couldn't I have singularised?
couldn't you have singularised?
couldn't he have singularised?
couldn't we have singularised?
couldn't you have singularised?
couldn't they have singularised? 	couldn't I have been singularising?
couldn't you have been singularising?
couldn't he have been singularising?
couldn't we have been singularising?
couldn't you have been singularising?
couldn't they have been singularising?