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