English verb conjugation
COULD OINK

Regular verb: oink - oinked - oinked

Affirmation

Simple form	V-ing form
I could oink you could oink he could oink we could oink you could oink they could oink	I could be oinking you could be oinking he could be oinking we could be oinking you could be oinking they could be oinking
Perfect	V-ing perfect
I could have oinked you could have oinked he could have oinked we could have oinked you could have oinked they could have oinked	I could have been oinking you could have been oinking he could have been oinking we could have been oinking you could have been oinking they could have been oinking

Negation

Simple form	V-ing form
I couldn't oink you couldn't oink he couldn't oink we couldn't oink you couldn't oink they couldn't oink	I couldn't be oinking you couldn't be oinking he couldn't be oinking we couldn't be oinking you couldn't be oinking they couldn't be oinking
Perfect	V-ing perfect
I couldn't have oinked you couldn't have oinked he couldn't have oinked we couldn't have oinked you couldn't have oinked they couldn't have oinked	I couldn't have been oinking you couldn't have been oinking he couldn't have been oinking we couldn't have been oinking you couldn't have been oinking they couldn't have been oinking

Interrogative form

Simple form	V-ing form
could I oink? could you oink? could he oink? could we oink? could you oink? could they oink?	could I be oinking? could you be oinking? could he be oinking? could we be oinking? could you be oinking? could they be oinking?
Perfect	V-ing perfect
could I have oinked? could you have oinked? could he have oinked? could we have oinked? could you have oinked? could they have oinked?	could I have been oinking? could you have been oinking? could he have been oinking? could we have been oinking? could you have been oinking? could they have been oinking?

Interro-negative form

Simple form	V-ing form
couldn't I oink? couldn't you oink? couldn't he oink? couldn't we oink? couldn't you oink? couldn't they oink?	couldn't I be oinking? couldn't you be oinking? couldn't he be oinking? couldn't we be oinking? couldn't you be oinking? couldn't they be oinking?
Perfect	V-ing perfect
couldn't I have oinked? couldn't you have oinked? couldn't he have oinked? couldn't we have oinked? couldn't you have oinked? couldn't they have oinked?	couldn't I have been oinking? couldn't you have been oinking? couldn't he have been oinking? couldn't we have been oinking? couldn't you have been oinking? couldn't they have been oinking?