could sterilise
Verbo regolare: sterilise - sterilised- sterilised

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could sterilise
you could sterilise
he could sterilise
we could sterilise
you could sterilise
they could sterilise 	I could be sterilising
you could be sterilising
he could be sterilising
we could be sterilising
you could be sterilising
they could be sterilising	I could have sterilised
you could have sterilised
he could have sterilised
we could have sterilised
you could have sterilised
they could have sterilised	I could have been sterilising
you could have been sterilising
he could have been sterilising
we could have been sterilising
you could have been sterilising
they could have been sterilising	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not sterilise
you could not sterilise
he could not sterilise
we could not sterilise
you could not sterilise
they could not sterilise 	I could not be sterilising
you could not be sterilising
he could not be sterilising
we could not be sterilising
you could not be sterilising
they could not be sterilising	I could not have sterilised
you could not have sterilised
he could not have sterilised
we could not have sterilised
you could not have sterilised
they could not have sterilised	I could not have been sterilising
you could not have been sterilising
he could not have been sterilising
we could not have been sterilising
you could not have been sterilising
they could not have been sterilising	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I sterilise?
could you sterilise?
could he sterilise?
could we sterilise?
could you sterilise?
could they sterilise? 	could I be sterilising?
could you be sterilising?
could he be sterilising?
could we be sterilising?
could you be sterilising?
could they be sterilising? 	could I have sterilised?
could you have sterilised?
could he have sterilised?
could we have sterilised?
could you have sterilised?
could they have sterilised? 	could I have been sterilising?
could you have been sterilising?
could he have been sterilising?
could we have been sterilising?
could you have been sterilising?
could they have been sterilising? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not sterilise?
could you not sterilise?
could he not sterilise?
could we not sterilise?
could you not sterilise?
could they not sterilise? 	could I not be sterilising?
could you not be sterilising?
could he not be sterilising?
could we not be sterilising?
could you not be sterilising?
could they not be sterilising? 	could I not have sterilised?
could you not have sterilised?
could he not have sterilised?
could we not have sterilised?
could you not have sterilised?
could they not have sterilised? 	could I not have been sterilising?
could you not have been sterilising?
could he not have been sterilising?
could we not have been sterilising?
could you not have been sterilising?
could they not have been sterilising?