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