English verb conjugation
COULD PRINK

Regular verb: prink - prinked - prinked

Affirmation

Simple form	V-ing form
I could prink you could prink he could prink we could prink you could prink they could prink	I could be prinking you could be prinking he could be prinking we could be prinking you could be prinking they could be prinking
Perfect	V-ing perfect
I could have prinked you could have prinked he could have prinked we could have prinked you could have prinked they could have prinked	I could have been prinking you could have been prinking he could have been prinking we could have been prinking you could have been prinking they could have been prinking

Negation

Simple form	V-ing form
I couldn't prink you couldn't prink he couldn't prink we couldn't prink you couldn't prink they couldn't prink	I couldn't be prinking you couldn't be prinking he couldn't be prinking we couldn't be prinking you couldn't be prinking they couldn't be prinking
Perfect	V-ing perfect
I couldn't have prinked you couldn't have prinked he couldn't have prinked we couldn't have prinked you couldn't have prinked they couldn't have prinked	I couldn't have been prinking you couldn't have been prinking he couldn't have been prinking we couldn't have been prinking you couldn't have been prinking they couldn't have been prinking

Interrogative form

Simple form	V-ing form
could I prink? could you prink? could he prink? could we prink? could you prink? could they prink?	could I be prinking? could you be prinking? could he be prinking? could we be prinking? could you be prinking? could they be prinking?
Perfect	V-ing perfect
could I have prinked? could you have prinked? could he have prinked? could we have prinked? could you have prinked? could they have prinked?	could I have been prinking? could you have been prinking? could he have been prinking? could we have been prinking? could you have been prinking? could they have been prinking?

Interro-negative form

Simple form	V-ing form
couldn't I prink? couldn't you prink? couldn't he prink? couldn't we prink? couldn't you prink? couldn't they prink?	couldn't I be prinking? couldn't you be prinking? couldn't he be prinking? couldn't we be prinking? couldn't you be prinking? couldn't they be prinking?
Perfect	V-ing perfect
couldn't I have prinked? couldn't you have prinked? couldn't he have prinked? couldn't we have prinked? couldn't you have prinked? couldn't they have prinked?	couldn't I have been prinking? couldn't you have been prinking? couldn't he have been prinking? couldn't we have been prinking? couldn't you have been prinking? couldn't they have been prinking?