Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could plink plink you could plink plink he could plink plink we could plink plink you could plink plink they could plink plink
V-ing form
I could be plink plinking you could be plink plinking he could be plink plinking we could be plink plinking you could be plink plinking they could be plink plinking
Perfect
I could have plink plinked you could have plink plinked he could have plink plinked we could have plink plinked you could have plink plinked they could have plink plinked
V-ing perfect
I could have been plink plinking you could have been plink plinking he could have been plink plinking we could have been plink plinking you could have been plink plinking they could have been plink plinking
Negation
Simple form
I couldn't plink plink you couldn't plink plink he couldn't plink plink we couldn't plink plink you couldn't plink plink they couldn't plink plink
V-ing form
I couldn't be plink plinking you couldn't be plink plinking he couldn't be plink plinking we couldn't be plink plinking you couldn't be plink plinking they couldn't be plink plinking
Perfect
I couldn't have plink plinked you couldn't have plink plinked he couldn't have plink plinked we couldn't have plink plinked you couldn't have plink plinked they couldn't have plink plinked
V-ing perfect
I couldn't have been plink plinking you couldn't have been plink plinking he couldn't have been plink plinking we couldn't have been plink plinking you couldn't have been plink plinking they couldn't have been plink plinking
Interrogative form
Simple form
could I plink plink? could you plink plink? could he plink plink? could we plink plink? could you plink plink? could they plink plink?
V-ing form
could I be plink plinking? could you be plink plinking? could he be plink plinking? could we be plink plinking? could you be plink plinking? could they be plink plinking?
Perfect
could I have plink plinked? could you have plink plinked? could he have plink plinked? could we have plink plinked? could you have plink plinked? could they have plink plinked?
V-ing perfect
could I have been plink plinking? could you have been plink plinking? could he have been plink plinking? could we have been plink plinking? could you have been plink plinking? could they have been plink plinking?
Interro-negative form
Simple form
couldn't I plink plink? couldn't you plink plink? couldn't he plink plink? couldn't we plink plink? couldn't you plink plink? couldn't they plink plink?
V-ing form
couldn't I be plink plinking? couldn't you be plink plinking? couldn't he be plink plinking? couldn't we be plink plinking? couldn't you be plink plinking? couldn't they be plink plinking?
Perfect
couldn't I have plink plinked? couldn't you have plink plinked? couldn't he have plink plinked? couldn't we have plink plinked? couldn't you have plink plinked? couldn't they have plink plinked?
V-ing perfect
couldn't I have been plink plinking? couldn't you have been plink plinking? couldn't he have been plink plinking? couldn't we have been plink plinking? couldn't you have been plink plinking? couldn't they have been plink plinking?