could theorise
Verbo regular: theorise - theorised- theorised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could theorise
you could theorise
he could theorise
we could theorise
you could theorise
they could theorise 	I could be theorising
you could be theorising
he could be theorising
we could be theorising
you could be theorising
they could be theorising	I could have theorised
you could have theorised
he could have theorised
we could have theorised
you could have theorised
they could have theorised	I could have been theorising
you could have been theorising
he could have been theorising
we could have been theorising
you could have been theorising
they could have been theorising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not theorise
you could not theorise
he could not theorise
we could not theorise
you could not theorise
they could not theorise 	I could not be theorising
you could not be theorising
he could not be theorising
we could not be theorising
you could not be theorising
they could not be theorising	I could not have theorised
you could not have theorised
he could not have theorised
we could not have theorised
you could not have theorised
they could not have theorised	I could not have been theorising
you could not have been theorising
he could not have been theorising
we could not have been theorising
you could not have been theorising
they could not have been theorising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I theorise?
could you theorise?
could he theorise?
could we theorise?
could you theorise?
could they theorise? 	could I be theorising?
could you be theorising?
could he be theorising?
could we be theorising?
could you be theorising?
could they be theorising? 	could I have theorised?
could you have theorised?
could he have theorised?
could we have theorised?
could you have theorised?
could they have theorised? 	could I have been theorising?
could you have been theorising?
could he have been theorising?
could we have been theorising?
could you have been theorising?
could they have been theorising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not theorise?
could you not theorise?
could he not theorise?
could we not theorise?
could you not theorise?
could they not theorise? 	could I not be theorising?
could you not be theorising?
could he not be theorising?
could we not be theorising?
could you not be theorising?
could they not be theorising? 	could I not have theorised?
could you not have theorised?
could he not have theorised?
could we not have theorised?
could you not have theorised?
could they not have theorised? 	could I not have been theorising?
could you not have been theorising?
could he not have been theorising?
could we not have been theorising?
could you not have been theorising?
could they not have been theorising?