I could depend you could depend he could depend we could depend you could depend they could depend
V-ing form
I could be depending you could be depending he could be depending we could be depending you could be depending they could be depending
Perfect
I could have depended you could have depended he could have depended we could have depended you could have depended they could have depended
V-ing perfect
I could have been depending you could have been depending he could have been depending we could have been depending you could have been depending they could have been depending
Negation
Simple form
I could not depend you could not depend he could not depend we could not depend you could not depend they could not depend
V-ing form
I could not be depending you could not be depending he could not be depending we could not be depending you could not be depending they could not be depending
Perfect
I could not have depended you could not have depended he could not have depended we could not have depended you could not have depended they could not have depended
V-ing perfect
I could not have been depending you could not have been depending he could not have been depending we could not have been depending you could not have been depending they could not have been depending
Interrogative form
Simple form
could I depend? could you depend? could he depend? could we depend? could you depend? could they depend?
V-ing form
could I be depending? could you be depending? could he be depending? could we be depending? could you be depending? could they be depending?
Perfect
could I have depended? could you have depended? could he have depended? could we have depended? could you have depended? could they have depended?
V-ing perfect
could I have been depending? could you have been depending? could he have been depending? could we have been depending? could you have been depending? could they have been depending?
Interro-negative form
Simple form
could I not depend? could you not depend? could he not depend? could we not depend? could you not depend? could they not depend?
V-ing form
could I not be depending? could you not be depending? could he not be depending? could we not be depending? could you not be depending? could they not be depending?
Perfect
could I not have depended? could you not have depended? could he not have depended? could we not have depended? could you not have depended? could they not have depended?
V-ing perfect
could I not have been depending? could you not have been depending? could he not have been depending? could we not have been depending? could you not have been depending? could they not have been depending?