English verb conjugation
MUST SWITCHBACK

Regular verb: switchback - switchbacked - switchbacked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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