I could ear you could ear he could ear we could ear you could ear they could ear
V-ing form
I could be earing you could be earing he could be earing we could be earing you could be earing they could be earing
Perfect
I could have eared you could have eared he could have eared we could have eared you could have eared they could have eared
V-ing perfect
I could have been earing you could have been earing he could have been earing we could have been earing you could have been earing they could have been earing
Negation
Simple form
I couldn't ear you couldn't ear he couldn't ear we couldn't ear you couldn't ear they couldn't ear
V-ing form
I couldn't be earing you couldn't be earing he couldn't be earing we couldn't be earing you couldn't be earing they couldn't be earing
Perfect
I couldn't have eared you couldn't have eared he couldn't have eared we couldn't have eared you couldn't have eared they couldn't have eared
V-ing perfect
I couldn't have been earing you couldn't have been earing he couldn't have been earing we couldn't have been earing you couldn't have been earing they couldn't have been earing
Interrogative form
Simple form
could I ear? could you ear? could he ear? could we ear? could you ear? could they ear?
V-ing form
could I be earing? could you be earing? could he be earing? could we be earing? could you be earing? could they be earing?
Perfect
could I have eared? could you have eared? could he have eared? could we have eared? could you have eared? could they have eared?
V-ing perfect
could I have been earing? could you have been earing? could he have been earing? could we have been earing? could you have been earing? could they have been earing?
Interro-negative form
Simple form
couldn't I ear? couldn't you ear? couldn't he ear? couldn't we ear? couldn't you ear? couldn't they ear?
V-ing form
couldn't I be earing? couldn't you be earing? couldn't he be earing? couldn't we be earing? couldn't you be earing? couldn't they be earing?
Perfect
couldn't I have eared? couldn't you have eared? couldn't he have eared? couldn't we have eared? couldn't you have eared? couldn't they have eared?
V-ing perfect
couldn't I have been earing? couldn't you have been earing? couldn't he have been earing? couldn't we have been earing? couldn't you have been earing? couldn't they have been earing?