English verb conjugation
COULD SWITCHBACK

Regular verb: switchback - switchbacked - switchbacked

Affirmation

Simple form	V-ing form
I could switchback you could switchback he could switchback we could switchback you could switchback they could switchback	I could be switchbacking you could be switchbacking he could be switchbacking we could be switchbacking you could be switchbacking they could be switchbacking
Perfect	V-ing perfect
I could have switchbacked you could have switchbacked he could have switchbacked we could have switchbacked you could have switchbacked they could have switchbacked	I could have been switchbacking you could have been switchbacking he could have been switchbacking we could have been switchbacking you could have been switchbacking they could have been switchbacking

Negation

Simple form	V-ing form
I couldn't switchback you couldn't switchback he couldn't switchback we couldn't switchback you couldn't switchback they couldn't switchback	I couldn't be switchbacking you couldn't be switchbacking he couldn't be switchbacking we couldn't be switchbacking you couldn't be switchbacking they couldn't be switchbacking
Perfect	V-ing perfect
I couldn't have switchbacked you couldn't have switchbacked he couldn't have switchbacked we couldn't have switchbacked you couldn't have switchbacked they couldn't have switchbacked	I couldn't have been switchbacking you couldn't have been switchbacking he couldn't have been switchbacking we couldn't have been switchbacking you couldn't have been switchbacking they couldn't have been switchbacking

Interrogative form

Simple form	V-ing form
could I switchback? could you switchback? could he switchback? could we switchback? could you switchback? could they switchback?	could I be switchbacking? could you be switchbacking? could he be switchbacking? could we be switchbacking? could you be switchbacking? could they be switchbacking?
Perfect	V-ing perfect
could I have switchbacked? could you have switchbacked? could he have switchbacked? could we have switchbacked? could you have switchbacked? could they have switchbacked?	could I have been switchbacking? could you have been switchbacking? could he have been switchbacking? could we have been switchbacking? could you have been switchbacking? could they have been switchbacking?

Interro-negative form

Simple form	V-ing form
couldn't I switchback? couldn't you switchback? couldn't he switchback? couldn't we switchback? couldn't you switchback? couldn't they switchback?	couldn't I be switchbacking? couldn't you be switchbacking? couldn't he be switchbacking? couldn't we be switchbacking? couldn't you be switchbacking? couldn't they be switchbacking?
Perfect	V-ing perfect
couldn't I have switchbacked? couldn't you have switchbacked? couldn't he have switchbacked? couldn't we have switchbacked? couldn't you have switchbacked? couldn't they have switchbacked?	couldn't I have been switchbacking? couldn't you have been switchbacking? couldn't he have been switchbacking? couldn't we have been switchbacking? couldn't you have been switchbacking? couldn't they have been switchbacking?