I could motorize you could motorize he could motorize we could motorize you could motorize they could motorize
V-ing form
I could be motorizing you could be motorizing he could be motorizing we could be motorizing you could be motorizing they could be motorizing
Perfect
I could have motorized you could have motorized he could have motorized we could have motorized you could have motorized they could have motorized
V-ing perfect
I could have been motorizing you could have been motorizing he could have been motorizing we could have been motorizing you could have been motorizing they could have been motorizing
Negation
Simple form
I couldn't motorize you couldn't motorize he couldn't motorize we couldn't motorize you couldn't motorize they couldn't motorize
V-ing form
I couldn't be motorizing you couldn't be motorizing he couldn't be motorizing we couldn't be motorizing you couldn't be motorizing they couldn't be motorizing
Perfect
I couldn't have motorized you couldn't have motorized he couldn't have motorized we couldn't have motorized you couldn't have motorized they couldn't have motorized
V-ing perfect
I couldn't have been motorizing you couldn't have been motorizing he couldn't have been motorizing we couldn't have been motorizing you couldn't have been motorizing they couldn't have been motorizing
Interrogative form
Simple form
could I motorize? could you motorize? could he motorize? could we motorize? could you motorize? could they motorize?
V-ing form
could I be motorizing? could you be motorizing? could he be motorizing? could we be motorizing? could you be motorizing? could they be motorizing?
Perfect
could I have motorized? could you have motorized? could he have motorized? could we have motorized? could you have motorized? could they have motorized?
V-ing perfect
could I have been motorizing? could you have been motorizing? could he have been motorizing? could we have been motorizing? could you have been motorizing? could they have been motorizing?
Interro-negative form
Simple form
couldn't I motorize? couldn't you motorize? couldn't he motorize? couldn't we motorize? couldn't you motorize? couldn't they motorize?
V-ing form
couldn't I be motorizing? couldn't you be motorizing? couldn't he be motorizing? couldn't we be motorizing? couldn't you be motorizing? couldn't they be motorizing?
Perfect
couldn't I have motorized? couldn't you have motorized? couldn't he have motorized? couldn't we have motorized? couldn't you have motorized? couldn't they have motorized?
V-ing perfect
couldn't I have been motorizing? couldn't you have been motorizing? couldn't he have been motorizing? couldn't we have been motorizing? couldn't you have been motorizing? couldn't they have been motorizing?