English verb conjugation
COULD CAB

Regular verb: cab - cabed - cabed

Affirmation

Simple form	V-ing form
I could cab you could cab he could cab we could cab you could cab they could cab	I could be cabing you could be cabing he could be cabing we could be cabing you could be cabing they could be cabing
Perfect	V-ing perfect
I could have cabed you could have cabed he could have cabed we could have cabed you could have cabed they could have cabed	I could have been cabing you could have been cabing he could have been cabing we could have been cabing you could have been cabing they could have been cabing

Negation

Simple form	V-ing form
I couldn't cab you couldn't cab he couldn't cab we couldn't cab you couldn't cab they couldn't cab	I couldn't be cabing you couldn't be cabing he couldn't be cabing we couldn't be cabing you couldn't be cabing they couldn't be cabing
Perfect	V-ing perfect
I couldn't have cabed you couldn't have cabed he couldn't have cabed we couldn't have cabed you couldn't have cabed they couldn't have cabed	I couldn't have been cabing you couldn't have been cabing he couldn't have been cabing we couldn't have been cabing you couldn't have been cabing they couldn't have been cabing

Interrogative form

Simple form	V-ing form
could I cab? could you cab? could he cab? could we cab? could you cab? could they cab?	could I be cabing? could you be cabing? could he be cabing? could we be cabing? could you be cabing? could they be cabing?
Perfect	V-ing perfect
could I have cabed? could you have cabed? could he have cabed? could we have cabed? could you have cabed? could they have cabed?	could I have been cabing? could you have been cabing? could he have been cabing? could we have been cabing? could you have been cabing? could they have been cabing?

Interro-negative form

Simple form	V-ing form
couldn't I cab? couldn't you cab? couldn't he cab? couldn't we cab? couldn't you cab? couldn't they cab?	couldn't I be cabing? couldn't you be cabing? couldn't he be cabing? couldn't we be cabing? couldn't you be cabing? couldn't they be cabing?
Perfect	V-ing perfect
couldn't I have cabed? couldn't you have cabed? couldn't he have cabed? couldn't we have cabed? couldn't you have cabed? couldn't they have cabed?	couldn't I have been cabing? couldn't you have been cabing? couldn't he have been cabing? couldn't we have been cabing? couldn't you have been cabing? couldn't they have been cabing?