I could garage you could garage she could garage we could garage you could garage they could garage
V-ing form
I could be garaging you could be garaging she could be garaging we could be garaging you could be garaging they could be garaging
Perfect
I could have garaged you could have garaged she could have garaged we could have garaged you could have garaged they could have garaged
V-ing perfect
I could have been garaging you could have been garaging she could have been garaging we could have been garaging you could have been garaging they could have been garaging
Negation
Simple form
I could not garage you could not garage she could not garage we could not garage you could not garage they could not garage
V-ing form
I could not be garaging you could not be garaging she could not be garaging we could not be garaging you could not be garaging they could not be garaging
Perfect
I could not have garaged you could not have garaged she could not have garaged we could not have garaged you could not have garaged they could not have garaged
V-ing perfect
I could not have been garaging you could not have been garaging she could not have been garaging we could not have been garaging you could not have been garaging they could not have been garaging
Interrogative form
Simple form
could I garage? could you garage? could she garage? could we garage? could you garage? could they garage?
V-ing form
could I be garaging? could you be garaging? could she be garaging? could we be garaging? could you be garaging? could they be garaging?
Perfect
could I have garaged? could you have garaged? could she have garaged? could we have garaged? could you have garaged? could they have garaged?
V-ing perfect
could I have been garaging? could you have been garaging? could she have been garaging? could we have been garaging? could you have been garaging? could they have been garaging?
Interro-negative form
Simple form
could I not garage? could you not garage? could she not garage? could we not garage? could you not garage? could they not garage?
V-ing form
could I not be garaging? could you not be garaging? could she not be garaging? could we not be garaging? could you not be garaging? could they not be garaging?
Perfect
could I not have garaged? could you not have garaged? could she not have garaged? could we not have garaged? could you not have garaged? could they not have garaged?
V-ing perfect
could I not have been garaging? could you not have been garaging? could she not have been garaging? could we not have been garaging? could you not have been garaging? could they not have been garaging?