could specialise
Verbo regular: specialise - specialised- specialised

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could specialise
you could specialise
he could specialise
we could specialise
you could specialise
they could specialise 	I could be specialising
you could be specialising
he could be specialising
we could be specialising
you could be specialising
they could be specialising	I could have specialised
you could have specialised
he could have specialised
we could have specialised
you could have specialised
they could have specialised	I could have been specialising
you could have been specialising
he could have been specialising
we could have been specialising
you could have been specialising
they could have been specialising	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not specialise
you could not specialise
he could not specialise
we could not specialise
you could not specialise
they could not specialise 	I could not be specialising
you could not be specialising
he could not be specialising
we could not be specialising
you could not be specialising
they could not be specialising	I could not have specialised
you could not have specialised
he could not have specialised
we could not have specialised
you could not have specialised
they could not have specialised	I could not have been specialising
you could not have been specialising
he could not have been specialising
we could not have been specialising
you could not have been specialising
they could not have been specialising	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I specialise?
could you specialise?
could he specialise?
could we specialise?
could you specialise?
could they specialise? 	could I be specialising?
could you be specialising?
could he be specialising?
could we be specialising?
could you be specialising?
could they be specialising? 	could I have specialised?
could you have specialised?
could he have specialised?
could we have specialised?
could you have specialised?
could they have specialised? 	could I have been specialising?
could you have been specialising?
could he have been specialising?
could we have been specialising?
could you have been specialising?
could they have been specialising? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not specialise?
could you not specialise?
could he not specialise?
could we not specialise?
could you not specialise?
could they not specialise? 	could I not be specialising?
could you not be specialising?
could he not be specialising?
could we not be specialising?
could you not be specialising?
could they not be specialising? 	could I not have specialised?
could you not have specialised?
could he not have specialised?
could we not have specialised?
could you not have specialised?
could they not have specialised? 	could I not have been specialising?
could you not have been specialising?
could he not have been specialising?
could we not have been specialising?
could you not have been specialising?
could they not have been specialising?