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