English verb conjugation
COULD PROWL

Regular verb: prowl - prowled - prowled

Affirmation

Simple form	V-ing form
I could prowl you could prowl she could prowl we could prowl you could prowl they could prowl	I could be prowling you could be prowling she could be prowling we could be prowling you could be prowling they could be prowling
Perfect	V-ing perfect
I could have prowled you could have prowled she could have prowled we could have prowled you could have prowled they could have prowled	I could have been prowling you could have been prowling she could have been prowling we could have been prowling you could have been prowling they could have been prowling

Negation

Simple form	V-ing form
I couldn't prowl you couldn't prowl she couldn't prowl we couldn't prowl you couldn't prowl they couldn't prowl	I couldn't be prowling you couldn't be prowling she couldn't be prowling we couldn't be prowling you couldn't be prowling they couldn't be prowling
Perfect	V-ing perfect
I couldn't have prowled you couldn't have prowled she couldn't have prowled we couldn't have prowled you couldn't have prowled they couldn't have prowled	I couldn't have been prowling you couldn't have been prowling she couldn't have been prowling we couldn't have been prowling you couldn't have been prowling they couldn't have been prowling

Interrogative form

Simple form	V-ing form
could I prowl? could you prowl? could she prowl? could we prowl? could you prowl? could they prowl?	could I be prowling? could you be prowling? could she be prowling? could we be prowling? could you be prowling? could they be prowling?
Perfect	V-ing perfect
could I have prowled? could you have prowled? could she have prowled? could we have prowled? could you have prowled? could they have prowled?	could I have been prowling? could you have been prowling? could she have been prowling? could we have been prowling? could you have been prowling? could they have been prowling?

Interro-negative form

Simple form	V-ing form
couldn't I prowl? couldn't you prowl? couldn't she prowl? couldn't we prowl? couldn't you prowl? couldn't they prowl?	couldn't I be prowling? couldn't you be prowling? couldn't she be prowling? couldn't we be prowling? couldn't you be prowling? couldn't they be prowling?
Perfect	V-ing perfect
couldn't I have prowled? couldn't you have prowled? couldn't she have prowled? couldn't we have prowled? couldn't you have prowled? couldn't they have prowled?	couldn't I have been prowling? couldn't you have been prowling? couldn't she have been prowling? couldn't we have been prowling? couldn't you have been prowling? couldn't they have been prowling?