English verb conjugation
COULD JIB

Regular verb: jib - jibbed - jibbed

Affirmation

Simple form	V-ing form
I could jib you could jib he could jib we could jib you could jib they could jib	I could be jibbing you could be jibbing he could be jibbing we could be jibbing you could be jibbing they could be jibbing
Perfect	V-ing perfect
I could have jibbed you could have jibbed he could have jibbed we could have jibbed you could have jibbed they could have jibbed	I could have been jibbing you could have been jibbing he could have been jibbing we could have been jibbing you could have been jibbing they could have been jibbing

Negation

Simple form	V-ing form
I couldn't jib you couldn't jib he couldn't jib we couldn't jib you couldn't jib they couldn't jib	I couldn't be jibbing you couldn't be jibbing he couldn't be jibbing we couldn't be jibbing you couldn't be jibbing they couldn't be jibbing
Perfect	V-ing perfect
I couldn't have jibbed you couldn't have jibbed he couldn't have jibbed we couldn't have jibbed you couldn't have jibbed they couldn't have jibbed	I couldn't have been jibbing you couldn't have been jibbing he couldn't have been jibbing we couldn't have been jibbing you couldn't have been jibbing they couldn't have been jibbing

Interrogative form

Simple form	V-ing form
could I jib? could you jib? could he jib? could we jib? could you jib? could they jib?	could I be jibbing? could you be jibbing? could he be jibbing? could we be jibbing? could you be jibbing? could they be jibbing?
Perfect	V-ing perfect
could I have jibbed? could you have jibbed? could he have jibbed? could we have jibbed? could you have jibbed? could they have jibbed?	could I have been jibbing? could you have been jibbing? could he have been jibbing? could we have been jibbing? could you have been jibbing? could they have been jibbing?

Interro-negative form

Simple form	V-ing form
couldn't I jib? couldn't you jib? couldn't he jib? couldn't we jib? couldn't you jib? couldn't they jib?	couldn't I be jibbing? couldn't you be jibbing? couldn't he be jibbing? couldn't we be jibbing? couldn't you be jibbing? couldn't they be jibbing?
Perfect	V-ing perfect
couldn't I have jibbed? couldn't you have jibbed? couldn't he have jibbed? couldn't we have jibbed? couldn't you have jibbed? couldn't they have jibbed?	couldn't I have been jibbing? couldn't you have been jibbing? couldn't he have been jibbing? couldn't we have been jibbing? couldn't you have been jibbing? couldn't they have been jibbing?