English verb conjugation
COULD UNBOLT

Regular verb: unbolt - unbolted - unbolted

Affirmation

Simple form	V-ing form
I could unbolt you could unbolt he could unbolt we could unbolt you could unbolt they could unbolt	I could be unbolting you could be unbolting he could be unbolting we could be unbolting you could be unbolting they could be unbolting
Perfect	V-ing perfect
I could have unbolted you could have unbolted he could have unbolted we could have unbolted you could have unbolted they could have unbolted	I could have been unbolting you could have been unbolting he could have been unbolting we could have been unbolting you could have been unbolting they could have been unbolting

Negation

Simple form	V-ing form
I could not unbolt you could not unbolt he could not unbolt we could not unbolt you could not unbolt they could not unbolt	I could not be unbolting you could not be unbolting he could not be unbolting we could not be unbolting you could not be unbolting they could not be unbolting
Perfect	V-ing perfect
I could not have unbolted you could not have unbolted he could not have unbolted we could not have unbolted you could not have unbolted they could not have unbolted	I could not have been unbolting you could not have been unbolting he could not have been unbolting we could not have been unbolting you could not have been unbolting they could not have been unbolting

Interrogative form

Simple form	V-ing form
could I unbolt? could you unbolt? could he unbolt? could we unbolt? could you unbolt? could they unbolt?	could I be unbolting? could you be unbolting? could he be unbolting? could we be unbolting? could you be unbolting? could they be unbolting?
Perfect	V-ing perfect
could I have unbolted? could you have unbolted? could he have unbolted? could we have unbolted? could you have unbolted? could they have unbolted?	could I have been unbolting? could you have been unbolting? could he have been unbolting? could we have been unbolting? could you have been unbolting? could they have been unbolting?

Interro-negative form

Simple form	V-ing form
could I not unbolt? could you not unbolt? could he not unbolt? could we not unbolt? could you not unbolt? could they not unbolt?	could I not be unbolting? could you not be unbolting? could he not be unbolting? could we not be unbolting? could you not be unbolting? could they not be unbolting?
Perfect	V-ing perfect
could I not have unbolted? could you not have unbolted? could he not have unbolted? could we not have unbolted? could you not have unbolted? could they not have unbolted?	could I not have been unbolting? could you not have been unbolting? could he not have been unbolting? could we not have been unbolting? could you not have been unbolting? could they not have been unbolting?