English verb conjugation
MUST SCAN

Regular verb: scan - scanned - scanned

Affirmation

Simple form	V-ing form
I must scan you must scan she must scan we must scan you must scan they must scan	I must be scanning you must be scanning she must be scanning we must be scanning you must be scanning they must be scanning
Perfect	V-ing perfect
I must have scanned you must have scanned she must have scanned we must have scanned you must have scanned they must have scanned	I must have been scanning you must have been scanning she must have been scanning we must have been scanning you must have been scanning they must have been scanning

Negation

Simple form	V-ing form
I mustn't scan you mustn't scan she mustn't scan we mustn't scan you mustn't scan they mustn't scan	I mustn't be scanning you mustn't be scanning she mustn't be scanning we mustn't be scanning you mustn't be scanning they mustn't be scanning
Perfect	V-ing perfect
I mustn't have scanned you mustn't have scanned she mustn't have scanned we mustn't have scanned you mustn't have scanned they mustn't have scanned	I mustn't have been scanning you mustn't have been scanning she mustn't have been scanning we mustn't have been scanning you mustn't have been scanning they mustn't have been scanning

Interrogative form

Simple form	V-ing form
must I scan? must you scan? must she scan? must we scan? must you scan? must they scan?	must I be scanning? must you be scanning? must she be scanning? must we be scanning? must you be scanning? must they be scanning?
Perfect	V-ing perfect
must I have scanned? must you have scanned? must she have scanned? must we have scanned? must you have scanned? must they have scanned?	must I have been scanning? must you have been scanning? must she have been scanning? must we have been scanning? must you have been scanning? must they have been scanning?

Interro-negative form

Simple form	V-ing form
mustn't I scan? mustn't you scan? mustn't she scan? mustn't we scan? mustn't you scan? mustn't they scan?	mustn't I be scanning? mustn't you be scanning? mustn't she be scanning? mustn't we be scanning? mustn't you be scanning? mustn't they be scanning?
Perfect	V-ing perfect
mustn't I have scanned? mustn't you have scanned? mustn't she have scanned? mustn't we have scanned? mustn't you have scanned? mustn't they have scanned?	mustn't I have been scanning? mustn't you have been scanning? mustn't she have been scanning? mustn't we have been scanning? mustn't you have been scanning? mustn't they have been scanning?