I could loco you could loco she could loco we could loco you could loco they could loco
V-ing form
I could be locoing you could be locoing she could be locoing we could be locoing you could be locoing they could be locoing
Perfect
I could have locoed you could have locoed she could have locoed we could have locoed you could have locoed they could have locoed
V-ing perfect
I could have been locoing you could have been locoing she could have been locoing we could have been locoing you could have been locoing they could have been locoing
Negation
Simple form
I could not loco you could not loco she could not loco we could not loco you could not loco they could not loco
V-ing form
I could not be locoing you could not be locoing she could not be locoing we could not be locoing you could not be locoing they could not be locoing
Perfect
I could not have locoed you could not have locoed she could not have locoed we could not have locoed you could not have locoed they could not have locoed
V-ing perfect
I could not have been locoing you could not have been locoing she could not have been locoing we could not have been locoing you could not have been locoing they could not have been locoing
Interrogative form
Simple form
could I loco? could you loco? could she loco? could we loco? could you loco? could they loco?
V-ing form
could I be locoing? could you be locoing? could she be locoing? could we be locoing? could you be locoing? could they be locoing?
Perfect
could I have locoed? could you have locoed? could she have locoed? could we have locoed? could you have locoed? could they have locoed?
V-ing perfect
could I have been locoing? could you have been locoing? could she have been locoing? could we have been locoing? could you have been locoing? could they have been locoing?
Interro-negative form
Simple form
could I not loco? could you not loco? could she not loco? could we not loco? could you not loco? could they not loco?
V-ing form
could I not be locoing? could you not be locoing? could she not be locoing? could we not be locoing? could you not be locoing? could they not be locoing?
Perfect
could I not have locoed? could you not have locoed? could she not have locoed? could we not have locoed? could you not have locoed? could they not have locoed?
V-ing perfect
could I not have been locoing? could you not have been locoing? could she not have been locoing? could we not have been locoing? could you not have been locoing? could they not have been locoing?