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