I could alight you could alight she could alight we could alight you could alight they could alight
V-ing form
I could be alighting you could be alighting she could be alighting we could be alighting you could be alighting they could be alighting
Perfect
I could have alighted you could have alighted she could have alighted we could have alighted you could have alighted they could have alighted
V-ing perfect
I could have been alighting you could have been alighting she could have been alighting we could have been alighting you could have been alighting they could have been alighting
Negation
Simple form
I could not alight you could not alight she could not alight we could not alight you could not alight they could not alight
V-ing form
I could not be alighting you could not be alighting she could not be alighting we could not be alighting you could not be alighting they could not be alighting
Perfect
I could not have alighted you could not have alighted she could not have alighted we could not have alighted you could not have alighted they could not have alighted
V-ing perfect
I could not have been alighting you could not have been alighting she could not have been alighting we could not have been alighting you could not have been alighting they could not have been alighting
Interrogative form
Simple form
could I alight? could you alight? could she alight? could we alight? could you alight? could they alight?
V-ing form
could I be alighting? could you be alighting? could she be alighting? could we be alighting? could you be alighting? could they be alighting?
Perfect
could I have alighted? could you have alighted? could she have alighted? could we have alighted? could you have alighted? could they have alighted?
V-ing perfect
could I have been alighting? could you have been alighting? could she have been alighting? could we have been alighting? could you have been alighting? could they have been alighting?
Interro-negative form
Simple form
could I not alight? could you not alight? could she not alight? could we not alight? could you not alight? could they not alight?
V-ing form
could I not be alighting? could you not be alighting? could she not be alighting? could we not be alighting? could you not be alighting? could they not be alighting?
Perfect
could I not have alighted? could you not have alighted? could she not have alighted? could we not have alighted? could you not have alighted? could they not have alighted?
V-ing perfect
could I not have been alighting? could you not have been alighting? could she not have been alighting? could we not have been alighting? could you not have been alighting? could they not have been alighting?