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