I could venture you could venture she could venture we could venture you could venture they could venture
V-ing form
I could be venturing you could be venturing she could be venturing we could be venturing you could be venturing they could be venturing
Perfect
I could have ventured you could have ventured she could have ventured we could have ventured you could have ventured they could have ventured
V-ing perfect
I could have been venturing you could have been venturing she could have been venturing we could have been venturing you could have been venturing they could have been venturing
Negation
Simple form
I could not venture you could not venture she could not venture we could not venture you could not venture they could not venture
V-ing form
I could not be venturing you could not be venturing she could not be venturing we could not be venturing you could not be venturing they could not be venturing
Perfect
I could not have ventured you could not have ventured she could not have ventured we could not have ventured you could not have ventured they could not have ventured
V-ing perfect
I could not have been venturing you could not have been venturing she could not have been venturing we could not have been venturing you could not have been venturing they could not have been venturing
Interrogative form
Simple form
could I venture? could you venture? could she venture? could we venture? could you venture? could they venture?
V-ing form
could I be venturing? could you be venturing? could she be venturing? could we be venturing? could you be venturing? could they be venturing?
Perfect
could I have ventured? could you have ventured? could she have ventured? could we have ventured? could you have ventured? could they have ventured?
V-ing perfect
could I have been venturing? could you have been venturing? could she have been venturing? could we have been venturing? could you have been venturing? could they have been venturing?
Interro-negative form
Simple form
could I not venture? could you not venture? could she not venture? could we not venture? could you not venture? could they not venture?
V-ing form
could I not be venturing? could you not be venturing? could she not be venturing? could we not be venturing? could you not be venturing? could they not be venturing?
Perfect
could I not have ventured? could you not have ventured? could she not have ventured? could we not have ventured? could you not have ventured? could they not have ventured?
V-ing perfect
could I not have been venturing? could you not have been venturing? could she not have been venturing? could we not have been venturing? could you not have been venturing? could they not have been venturing?