I can venture you can venture he can venture we can venture you can venture they can venture
V-ing form
I can be venturing you can be venturing he can be venturing we can be venturing you can be venturing they can be venturing
Perfect
I can have ventured you can have ventured he can have ventured we can have ventured you can have ventured they can have ventured
V-ing perfect
I can have been venturing you can have been venturing he can have been venturing we can have been venturing you can have been venturing they can have been venturing
Negation
Simple form
I can't venture you can't venture he can't venture we can't venture you can't venture they can't venture
V-ing form
I can't be venturing you can't be venturing he can't be venturing we can't be venturing you can't be venturing they can't be venturing
Perfect
I can't have ventured you can't have ventured he can't have ventured we can't have ventured you can't have ventured they can't have ventured
V-ing perfect
I can't have been venturing you can't have been venturing he can't have been venturing we can't have been venturing you can't have been venturing they can't have been venturing
Interrogative form
Simple form
can I venture? can you venture? can he venture? can we venture? can you venture? can they venture?
V-ing form
can I be venturing? can you be venturing? can he be venturing? can we be venturing? can you be venturing? can they be venturing?
Perfect
can I have ventured? can you have ventured? can he have ventured? can we have ventured? can you have ventured? can they have ventured?
V-ing perfect
can I have been venturing? can you have been venturing? can he have been venturing? can we have been venturing? can you have been venturing? can they have been venturing?
Interro-negative form
Simple form
can't I venture? can't you venture? can't he venture? can't we venture? can't you venture? can't they venture?
V-ing form
can't I be venturing? can't you be venturing? can't he be venturing? can't we be venturing? can't you be venturing? can't they be venturing?
Perfect
can't I have ventured? can't you have ventured? can't he have ventured? can't we have ventured? can't you have ventured? can't they have ventured?
V-ing perfect
can't I have been venturing? can't you have been venturing? can't he have been venturing? can't we have been venturing? can't you have been venturing? can't they have been venturing?