English verb conjugation
MUST QUICKSTEP

Regular verb: quickstep - quicksteped - quicksteped

Affirmation

Simple form	V-ing form
I must quickstep you must quickstep she must quickstep we must quickstep you must quickstep they must quickstep	I must be quicksteping you must be quicksteping she must be quicksteping we must be quicksteping you must be quicksteping they must be quicksteping
Perfect	V-ing perfect
I must have quicksteped you must have quicksteped she must have quicksteped we must have quicksteped you must have quicksteped they must have quicksteped	I must have been quicksteping you must have been quicksteping she must have been quicksteping we must have been quicksteping you must have been quicksteping they must have been quicksteping

Negation

Simple form	V-ing form
I mustn't quickstep you mustn't quickstep she mustn't quickstep we mustn't quickstep you mustn't quickstep they mustn't quickstep	I mustn't be quicksteping you mustn't be quicksteping she mustn't be quicksteping we mustn't be quicksteping you mustn't be quicksteping they mustn't be quicksteping
Perfect	V-ing perfect
I mustn't have quicksteped you mustn't have quicksteped she mustn't have quicksteped we mustn't have quicksteped you mustn't have quicksteped they mustn't have quicksteped	I mustn't have been quicksteping you mustn't have been quicksteping she mustn't have been quicksteping we mustn't have been quicksteping you mustn't have been quicksteping they mustn't have been quicksteping

Interrogative form

Simple form	V-ing form
must I quickstep? must you quickstep? must she quickstep? must we quickstep? must you quickstep? must they quickstep?	must I be quicksteping? must you be quicksteping? must she be quicksteping? must we be quicksteping? must you be quicksteping? must they be quicksteping?
Perfect	V-ing perfect
must I have quicksteped? must you have quicksteped? must she have quicksteped? must we have quicksteped? must you have quicksteped? must they have quicksteped?	must I have been quicksteping? must you have been quicksteping? must she have been quicksteping? must we have been quicksteping? must you have been quicksteping? must they have been quicksteping?

Interro-negative form

Simple form	V-ing form
mustn't I quickstep? mustn't you quickstep? mustn't she quickstep? mustn't we quickstep? mustn't you quickstep? mustn't they quickstep?	mustn't I be quicksteping? mustn't you be quicksteping? mustn't she be quicksteping? mustn't we be quicksteping? mustn't you be quicksteping? mustn't they be quicksteping?
Perfect	V-ing perfect
mustn't I have quicksteped? mustn't you have quicksteped? mustn't she have quicksteped? mustn't we have quicksteped? mustn't you have quicksteped? mustn't they have quicksteped?	mustn't I have been quicksteping? mustn't you have been quicksteping? mustn't she have been quicksteping? mustn't we have been quicksteping? mustn't you have been quicksteping? mustn't they have been quicksteping?