English verb conjugation
COULD POTTY-TRAIN

Regular verb: potty-train - potty-trained - potty-trained

Affirmation

Simple form	V-ing form
I could potty-train you could potty-train he could potty-train we could potty-train you could potty-train they could potty-train	I could be potty-training you could be potty-training he could be potty-training we could be potty-training you could be potty-training they could be potty-training
Perfect	V-ing perfect
I could have potty-trained you could have potty-trained he could have potty-trained we could have potty-trained you could have potty-trained they could have potty-trained	I could have been potty-training you could have been potty-training he could have been potty-training we could have been potty-training you could have been potty-training they could have been potty-training

Negation

Simple form	V-ing form
I couldn't potty-train you couldn't potty-train he couldn't potty-train we couldn't potty-train you couldn't potty-train they couldn't potty-train	I couldn't be potty-training you couldn't be potty-training he couldn't be potty-training we couldn't be potty-training you couldn't be potty-training they couldn't be potty-training
Perfect	V-ing perfect
I couldn't have potty-trained you couldn't have potty-trained he couldn't have potty-trained we couldn't have potty-trained you couldn't have potty-trained they couldn't have potty-trained	I couldn't have been potty-training you couldn't have been potty-training he couldn't have been potty-training we couldn't have been potty-training you couldn't have been potty-training they couldn't have been potty-training

Interrogative form

Simple form	V-ing form
could I potty-train? could you potty-train? could he potty-train? could we potty-train? could you potty-train? could they potty-train?	could I be potty-training? could you be potty-training? could he be potty-training? could we be potty-training? could you be potty-training? could they be potty-training?
Perfect	V-ing perfect
could I have potty-trained? could you have potty-trained? could he have potty-trained? could we have potty-trained? could you have potty-trained? could they have potty-trained?	could I have been potty-training? could you have been potty-training? could he have been potty-training? could we have been potty-training? could you have been potty-training? could they have been potty-training?

Interro-negative form

Simple form	V-ing form
couldn't I potty-train? couldn't you potty-train? couldn't he potty-train? couldn't we potty-train? couldn't you potty-train? couldn't they potty-train?	couldn't I be potty-training? couldn't you be potty-training? couldn't he be potty-training? couldn't we be potty-training? couldn't you be potty-training? couldn't they be potty-training?
Perfect	V-ing perfect
couldn't I have potty-trained? couldn't you have potty-trained? couldn't he have potty-trained? couldn't we have potty-trained? couldn't you have potty-trained? couldn't they have potty-trained?	couldn't I have been potty-training? couldn't you have been potty-training? couldn't he have been potty-training? couldn't we have been potty-training? couldn't you have been potty-training? couldn't they have been potty-training?