could sibilate
Verbo regolare: sibilate - sibilated- sibilated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could sibilate
you could sibilate
she could sibilate
we could sibilate
you could sibilate
they could sibilate 	I could be sibilating
you could be sibilating
she could be sibilating
we could be sibilating
you could be sibilating
they could be sibilating	I could have sibilated
you could have sibilated
she could have sibilated
we could have sibilated
you could have sibilated
they could have sibilated	I could have been sibilating
you could have been sibilating
she could have been sibilating
we could have been sibilating
you could have been sibilating
they could have been sibilating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not sibilate
you could not sibilate
she could not sibilate
we could not sibilate
you could not sibilate
they could not sibilate 	I could not be sibilating
you could not be sibilating
she could not be sibilating
we could not be sibilating
you could not be sibilating
they could not be sibilating	I could not have sibilated
you could not have sibilated
she could not have sibilated
we could not have sibilated
you could not have sibilated
they could not have sibilated	I could not have been sibilating
you could not have been sibilating
she could not have been sibilating
we could not have been sibilating
you could not have been sibilating
they could not have been sibilating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I sibilate?
could you sibilate?
could she sibilate?
could we sibilate?
could you sibilate?
could they sibilate? 	could I be sibilating?
could you be sibilating?
could she be sibilating?
could we be sibilating?
could you be sibilating?
could they be sibilating? 	could I have sibilated?
could you have sibilated?
could she have sibilated?
could we have sibilated?
could you have sibilated?
could they have sibilated? 	could I have been sibilating?
could you have been sibilating?
could she have been sibilating?
could we have been sibilating?
could you have been sibilating?
could they have been sibilating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not sibilate?
could you not sibilate?
could she not sibilate?
could we not sibilate?
could you not sibilate?
could they not sibilate? 	could I not be sibilating?
could you not be sibilating?
could she not be sibilating?
could we not be sibilating?
could you not be sibilating?
could they not be sibilating? 	could I not have sibilated?
could you not have sibilated?
could she not have sibilated?
could we not have sibilated?
could you not have sibilated?
could they not have sibilated? 	could I not have been sibilating?
could you not have been sibilating?
could she not have been sibilating?
could we not have been sibilating?
could you not have been sibilating?
could they not have been sibilating?