I could guide you could guide he could guide we could guide you could guide they could guide
V-ing form
I could be guiding you could be guiding he could be guiding we could be guiding you could be guiding they could be guiding
Perfect
I could have guided you could have guided he 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 he could have been guiding we could have been guiding you could have been guiding they could have been guiding
Negation
Simple form
I could not guide you could not guide he could not guide we could not guide you could not guide they could not guide
V-ing form
I could not be guiding you could not be guiding he could not be guiding we could not be guiding you could not be guiding they could not be guiding
Perfect
I could not have guided you could not have guided he could not have guided we could not have guided you could not have guided they could not have guided
V-ing perfect
I could not have been guiding you could not have been guiding he could not have been guiding we could not have been guiding you could not have been guiding they could not have been guiding
Interrogative form
Simple form
could I guide? could you guide? could he guide? could we guide? could you guide? could they guide?
V-ing form
could I be guiding? could you be guiding? could he be guiding? could we be guiding? could you be guiding? could they be guiding?
Perfect
could I have guided? could you have guided? could he 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 he have been guiding? could we have been guiding? could you have been guiding? could they have been guiding?
Interro-negative form
Simple form
could I not guide? could you not guide? could he not guide? could we not guide? could you not guide? could they not guide?
V-ing form
could I not be guiding? could you not be guiding? could he not be guiding? could we not be guiding? could you not be guiding? could they not be guiding?
Perfect
could I not have guided? could you not have guided? could he not have guided? could we not have guided? could you not have guided? could they not have guided?
V-ing perfect
could I not have been guiding? could you not have been guiding? could he not have been guiding? could we not have been guiding? could you not have been guiding? could they not have been guiding?