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