English verb conjugation
COULD JABBER

Regular verb: jabber - jabbered - jabbered

Affirmation

Simple form	V-ing form
I could jabber you could jabber he could jabber we could jabber you could jabber they could jabber	I could be jabbering you could be jabbering he could be jabbering we could be jabbering you could be jabbering they could be jabbering
Perfect	V-ing perfect
I could have jabbered you could have jabbered he could have jabbered we could have jabbered you could have jabbered they could have jabbered	I could have been jabbering you could have been jabbering he could have been jabbering we could have been jabbering you could have been jabbering they could have been jabbering

Negation

Simple form	V-ing form
I couldn't jabber you couldn't jabber he couldn't jabber we couldn't jabber you couldn't jabber they couldn't jabber	I couldn't be jabbering you couldn't be jabbering he couldn't be jabbering we couldn't be jabbering you couldn't be jabbering they couldn't be jabbering
Perfect	V-ing perfect
I couldn't have jabbered you couldn't have jabbered he couldn't have jabbered we couldn't have jabbered you couldn't have jabbered they couldn't have jabbered	I couldn't have been jabbering you couldn't have been jabbering he couldn't have been jabbering we couldn't have been jabbering you couldn't have been jabbering they couldn't have been jabbering

Interrogative form

Simple form	V-ing form
could I jabber? could you jabber? could he jabber? could we jabber? could you jabber? could they jabber?	could I be jabbering? could you be jabbering? could he be jabbering? could we be jabbering? could you be jabbering? could they be jabbering?
Perfect	V-ing perfect
could I have jabbered? could you have jabbered? could he have jabbered? could we have jabbered? could you have jabbered? could they have jabbered?	could I have been jabbering? could you have been jabbering? could he have been jabbering? could we have been jabbering? could you have been jabbering? could they have been jabbering?

Interro-negative form

Simple form	V-ing form
couldn't I jabber? couldn't you jabber? couldn't he jabber? couldn't we jabber? couldn't you jabber? couldn't they jabber?	couldn't I be jabbering? couldn't you be jabbering? couldn't he be jabbering? couldn't we be jabbering? couldn't you be jabbering? couldn't they be jabbering?
Perfect	V-ing perfect
couldn't I have jabbered? couldn't you have jabbered? couldn't he have jabbered? couldn't we have jabbered? couldn't you have jabbered? couldn't they have jabbered?	couldn't I have been jabbering? couldn't you have been jabbering? couldn't he have been jabbering? couldn't we have been jabbering? couldn't you have been jabbering? couldn't they have been jabbering?