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