English verb conjugation
COULD SABER

Regular verb: saber - sabered - sabered

Affirmation

Simple form	V-ing form
I could saber you could saber he could saber we could saber you could saber they could saber	I could be sabering you could be sabering he could be sabering we could be sabering you could be sabering they could be sabering
Perfect	V-ing perfect
I could have sabered you could have sabered he could have sabered we could have sabered you could have sabered they could have sabered	I could have been sabering you could have been sabering he could have been sabering we could have been sabering you could have been sabering they could have been sabering

Negation

Simple form	V-ing form
I couldn't saber you couldn't saber he couldn't saber we couldn't saber you couldn't saber they couldn't saber	I couldn't be sabering you couldn't be sabering he couldn't be sabering we couldn't be sabering you couldn't be sabering they couldn't be sabering
Perfect	V-ing perfect
I couldn't have sabered you couldn't have sabered he couldn't have sabered we couldn't have sabered you couldn't have sabered they couldn't have sabered	I couldn't have been sabering you couldn't have been sabering he couldn't have been sabering we couldn't have been sabering you couldn't have been sabering they couldn't have been sabering

Interrogative form

Simple form	V-ing form
could I saber? could you saber? could he saber? could we saber? could you saber? could they saber?	could I be sabering? could you be sabering? could he be sabering? could we be sabering? could you be sabering? could they be sabering?
Perfect	V-ing perfect
could I have sabered? could you have sabered? could he have sabered? could we have sabered? could you have sabered? could they have sabered?	could I have been sabering? could you have been sabering? could he have been sabering? could we have been sabering? could you have been sabering? could they have been sabering?

Interro-negative form

Simple form	V-ing form
couldn't I saber? couldn't you saber? couldn't he saber? couldn't we saber? couldn't you saber? couldn't they saber?	couldn't I be sabering? couldn't you be sabering? couldn't he be sabering? couldn't we be sabering? couldn't you be sabering? couldn't they be sabering?
Perfect	V-ing perfect
couldn't I have sabered? couldn't you have sabered? couldn't he have sabered? couldn't we have sabered? couldn't you have sabered? couldn't they have sabered?	couldn't I have been sabering? couldn't you have been sabering? couldn't he have been sabering? couldn't we have been sabering? couldn't you have been sabering? couldn't they have been sabering?