English verb conjugation
COULD SPEC

Regular verb: spec - speced - speced

Affirmation

Simple form	V-ing form
I could spec you could spec he could spec we could spec you could spec they could spec	I could be specing you could be specing he could be specing we could be specing you could be specing they could be specing
Perfect	V-ing perfect
I could have speced you could have speced he could have speced we could have speced you could have speced they could have speced	I could have been specing you could have been specing he could have been specing we could have been specing you could have been specing they could have been specing

Negation

Simple form	V-ing form
I couldn't spec you couldn't spec he couldn't spec we couldn't spec you couldn't spec they couldn't spec	I couldn't be specing you couldn't be specing he couldn't be specing we couldn't be specing you couldn't be specing they couldn't be specing
Perfect	V-ing perfect
I couldn't have speced you couldn't have speced he couldn't have speced we couldn't have speced you couldn't have speced they couldn't have speced	I couldn't have been specing you couldn't have been specing he couldn't have been specing we couldn't have been specing you couldn't have been specing they couldn't have been specing

Interrogative form

Simple form	V-ing form
could I spec? could you spec? could he spec? could we spec? could you spec? could they spec?	could I be specing? could you be specing? could he be specing? could we be specing? could you be specing? could they be specing?
Perfect	V-ing perfect
could I have speced? could you have speced? could he have speced? could we have speced? could you have speced? could they have speced?	could I have been specing? could you have been specing? could he have been specing? could we have been specing? could you have been specing? could they have been specing?

Interro-negative form

Simple form	V-ing form
couldn't I spec? couldn't you spec? couldn't he spec? couldn't we spec? couldn't you spec? couldn't they spec?	couldn't I be specing? couldn't you be specing? couldn't he be specing? couldn't we be specing? couldn't you be specing? couldn't they be specing?
Perfect	V-ing perfect
couldn't I have speced? couldn't you have speced? couldn't he have speced? couldn't we have speced? couldn't you have speced? couldn't they have speced?	couldn't I have been specing? couldn't you have been specing? couldn't he have been specing? couldn't we have been specing? couldn't you have been specing? couldn't they have been specing?