could alphabetise
Verbo regular: alphabetise - alphabetised- alphabetised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could alphabetise
you could alphabetise
he could alphabetise
we could alphabetise
you could alphabetise
they could alphabetise 	I could be alphabetising
you could be alphabetising
he could be alphabetising
we could be alphabetising
you could be alphabetising
they could be alphabetising	I could have alphabetised
you could have alphabetised
he could have alphabetised
we could have alphabetised
you could have alphabetised
they could have alphabetised	I could have been alphabetising
you could have been alphabetising
he could have been alphabetising
we could have been alphabetising
you could have been alphabetising
they could have been alphabetising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not alphabetise
you could not alphabetise
he could not alphabetise
we could not alphabetise
you could not alphabetise
they could not alphabetise 	I could not be alphabetising
you could not be alphabetising
he could not be alphabetising
we could not be alphabetising
you could not be alphabetising
they could not be alphabetising	I could not have alphabetised
you could not have alphabetised
he could not have alphabetised
we could not have alphabetised
you could not have alphabetised
they could not have alphabetised	I could not have been alphabetising
you could not have been alphabetising
he could not have been alphabetising
we could not have been alphabetising
you could not have been alphabetising
they could not have been alphabetising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I alphabetise?
could you alphabetise?
could he alphabetise?
could we alphabetise?
could you alphabetise?
could they alphabetise? 	could I be alphabetising?
could you be alphabetising?
could he be alphabetising?
could we be alphabetising?
could you be alphabetising?
could they be alphabetising? 	could I have alphabetised?
could you have alphabetised?
could he have alphabetised?
could we have alphabetised?
could you have alphabetised?
could they have alphabetised? 	could I have been alphabetising?
could you have been alphabetising?
could he have been alphabetising?
could we have been alphabetising?
could you have been alphabetising?
could they have been alphabetising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not alphabetise?
could you not alphabetise?
could he not alphabetise?
could we not alphabetise?
could you not alphabetise?
could they not alphabetise? 	could I not be alphabetising?
could you not be alphabetising?
could he not be alphabetising?
could we not be alphabetising?
could you not be alphabetising?
could they not be alphabetising? 	could I not have alphabetised?
could you not have alphabetised?
could he not have alphabetised?
could we not have alphabetised?
could you not have alphabetised?
could they not have alphabetised? 	could I not have been alphabetising?
could you not have been alphabetising?
could he not have been alphabetising?
could we not have been alphabetising?
could you not have been alphabetising?
could they not have been alphabetising?