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