English verb conjugation
COULD SUMMERSAULT

Regular verb: summersault - summersaulted - summersaulted

Affirmation

Simple form	V-ing form
I could summersault you could summersault he could summersault we could summersault you could summersault they could summersault	I could be summersaulting you could be summersaulting he could be summersaulting we could be summersaulting you could be summersaulting they could be summersaulting
Perfect	V-ing perfect
I could have summersaulted you could have summersaulted he could have summersaulted we could have summersaulted you could have summersaulted they could have summersaulted	I could have been summersaulting you could have been summersaulting he could have been summersaulting we could have been summersaulting you could have been summersaulting they could have been summersaulting

Negation

Simple form	V-ing form
I could not summersault you could not summersault he could not summersault we could not summersault you could not summersault they could not summersault	I could not be summersaulting you could not be summersaulting he could not be summersaulting we could not be summersaulting you could not be summersaulting they could not be summersaulting
Perfect	V-ing perfect
I could not have summersaulted you could not have summersaulted he could not have summersaulted we could not have summersaulted you could not have summersaulted they could not have summersaulted	I could not have been summersaulting you could not have been summersaulting he could not have been summersaulting we could not have been summersaulting you could not have been summersaulting they could not have been summersaulting

Interrogative form

Simple form	V-ing form
could I summersault? could you summersault? could he summersault? could we summersault? could you summersault? could they summersault?	could I be summersaulting? could you be summersaulting? could he be summersaulting? could we be summersaulting? could you be summersaulting? could they be summersaulting?
Perfect	V-ing perfect
could I have summersaulted? could you have summersaulted? could he have summersaulted? could we have summersaulted? could you have summersaulted? could they have summersaulted?	could I have been summersaulting? could you have been summersaulting? could he have been summersaulting? could we have been summersaulting? could you have been summersaulting? could they have been summersaulting?

Interro-negative form

Simple form	V-ing form
could I not summersault? could you not summersault? could he not summersault? could we not summersault? could you not summersault? could they not summersault?	could I not be summersaulting? could you not be summersaulting? could he not be summersaulting? could we not be summersaulting? could you not be summersaulting? could they not be summersaulting?
Perfect	V-ing perfect
could I not have summersaulted? could you not have summersaulted? could he not have summersaulted? could we not have summersaulted? could you not have summersaulted? could they not have summersaulted?	could I not have been summersaulting? could you not have been summersaulting? could he not have been summersaulting? could we not have been summersaulting? could you not have been summersaulting? could they not have been summersaulting?