I could goosestep you could goosestep he could goosestep we could goosestep you could goosestep they could goosestep
V-ing form
I could be goosesteping you could be goosesteping he could be goosesteping we could be goosesteping you could be goosesteping they could be goosesteping
Perfect
I could have goosesteped you could have goosesteped he could have goosesteped we could have goosesteped you could have goosesteped they could have goosesteped
V-ing perfect
I could have been goosesteping you could have been goosesteping he could have been goosesteping we could have been goosesteping you could have been goosesteping they could have been goosesteping
Negation
Simple form
I could not goosestep you could not goosestep he could not goosestep we could not goosestep you could not goosestep they could not goosestep
V-ing form
I could not be goosesteping you could not be goosesteping he could not be goosesteping we could not be goosesteping you could not be goosesteping they could not be goosesteping
Perfect
I could not have goosesteped you could not have goosesteped he could not have goosesteped we could not have goosesteped you could not have goosesteped they could not have goosesteped
V-ing perfect
I could not have been goosesteping you could not have been goosesteping he could not have been goosesteping we could not have been goosesteping you could not have been goosesteping they could not have been goosesteping
Interrogative form
Simple form
could I goosestep? could you goosestep? could he goosestep? could we goosestep? could you goosestep? could they goosestep?
V-ing form
could I be goosesteping? could you be goosesteping? could he be goosesteping? could we be goosesteping? could you be goosesteping? could they be goosesteping?
Perfect
could I have goosesteped? could you have goosesteped? could he have goosesteped? could we have goosesteped? could you have goosesteped? could they have goosesteped?
V-ing perfect
could I have been goosesteping? could you have been goosesteping? could he have been goosesteping? could we have been goosesteping? could you have been goosesteping? could they have been goosesteping?
Interro-negative form
Simple form
could I not goosestep? could you not goosestep? could he not goosestep? could we not goosestep? could you not goosestep? could they not goosestep?
V-ing form
could I not be goosesteping? could you not be goosesteping? could he not be goosesteping? could we not be goosesteping? could you not be goosesteping? could they not be goosesteping?
Perfect
could I not have goosesteped? could you not have goosesteped? could he not have goosesteped? could we not have goosesteped? could you not have goosesteped? could they not have goosesteped?
V-ing perfect
could I not have been goosesteping? could you not have been goosesteping? could he not have been goosesteping? could we not have been goosesteping? could you not have been goosesteping? could they not have been goosesteping?