I could hide you could hide she could hide we could hide you could hide they could hide
V-ing form
I could be hiding you could be hiding she could be hiding we could be hiding you could be hiding they could be hiding
Perfect
I could have hidden you could have hidden she could have hidden we could have hidden you could have hidden they could have hidden
V-ing perfect
I could have been hiding you could have been hiding she could have been hiding we could have been hiding you could have been hiding they could have been hiding
Negation
Simple form
I couldn't hide you couldn't hide she couldn't hide we couldn't hide you couldn't hide they couldn't hide
V-ing form
I couldn't be hiding you couldn't be hiding she couldn't be hiding we couldn't be hiding you couldn't be hiding they couldn't be hiding
Perfect
I couldn't have hidden you couldn't have hidden she couldn't have hidden we couldn't have hidden you couldn't have hidden they couldn't have hidden
V-ing perfect
I couldn't have been hiding you couldn't have been hiding she couldn't have been hiding we couldn't have been hiding you couldn't have been hiding they couldn't have been hiding
Interrogative form
Simple form
could I hide? could you hide? could she hide? could we hide? could you hide? could they hide?
V-ing form
could I be hiding? could you be hiding? could she be hiding? could we be hiding? could you be hiding? could they be hiding?
Perfect
could I have hidden? could you have hidden? could she have hidden? could we have hidden? could you have hidden? could they have hidden?
V-ing perfect
could I have been hiding? could you have been hiding? could she have been hiding? could we have been hiding? could you have been hiding? could they have been hiding?
Interro-negative form
Simple form
couldn't I hide? couldn't you hide? couldn't she hide? couldn't we hide? couldn't you hide? couldn't they hide?
V-ing form
couldn't I be hiding? couldn't you be hiding? couldn't she be hiding? couldn't we be hiding? couldn't you be hiding? couldn't they be hiding?
Perfect
couldn't I have hidden? couldn't you have hidden? couldn't she have hidden? couldn't we have hidden? couldn't you have hidden? couldn't they have hidden?
V-ing perfect
couldn't I have been hiding? couldn't you have been hiding? couldn't she have been hiding? couldn't we have been hiding? couldn't you have been hiding? couldn't they have been hiding?