I could depend you could depend she could depend we could depend you could depend they could depend
V-ing form
I could be depending you could be depending she could be depending we could be depending you could be depending they could be depending
Perfect
I could have depended you could have depended she 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 she 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 she 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 she 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 she 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 she 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 she depend? could we depend? could you depend? could they depend?
V-ing form
could I be depending? could you be depending? could she be depending? could we be depending? could you be depending? could they be depending?
Perfect
could I have depended? could you have depended? could she 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 she 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 she 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 she 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 she 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 she not have been depending? could we not have been depending? could you not have been depending? could they not have been depending?