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