English verb conjugation
MUST DECEIVE

Regular verb: deceive - deceived - deceived

Affirmation

Simple form	V-ing form
I must deceive you must deceive she must deceive we must deceive you must deceive they must deceive	I must be deceiving you must be deceiving she must be deceiving we must be deceiving you must be deceiving they must be deceiving
Perfect	V-ing perfect
I must have deceived you must have deceived she must have deceived we must have deceived you must have deceived they must have deceived	I must have been deceiving you must have been deceiving she must have been deceiving we must have been deceiving you must have been deceiving they must have been deceiving

Negation

Simple form	V-ing form
I mustn't deceive you mustn't deceive she mustn't deceive we mustn't deceive you mustn't deceive they mustn't deceive	I mustn't be deceiving you mustn't be deceiving she mustn't be deceiving we mustn't be deceiving you mustn't be deceiving they mustn't be deceiving
Perfect	V-ing perfect
I mustn't have deceived you mustn't have deceived she mustn't have deceived we mustn't have deceived you mustn't have deceived they mustn't have deceived	I mustn't have been deceiving you mustn't have been deceiving she mustn't have been deceiving we mustn't have been deceiving you mustn't have been deceiving they mustn't have been deceiving

Interrogative form

Simple form	V-ing form
must I deceive? must you deceive? must she deceive? must we deceive? must you deceive? must they deceive?	must I be deceiving? must you be deceiving? must she be deceiving? must we be deceiving? must you be deceiving? must they be deceiving?
Perfect	V-ing perfect
must I have deceived? must you have deceived? must she have deceived? must we have deceived? must you have deceived? must they have deceived?	must I have been deceiving? must you have been deceiving? must she have been deceiving? must we have been deceiving? must you have been deceiving? must they have been deceiving?

Interro-negative form

Simple form	V-ing form
mustn't I deceive? mustn't you deceive? mustn't she deceive? mustn't we deceive? mustn't you deceive? mustn't they deceive?	mustn't I be deceiving? mustn't you be deceiving? mustn't she be deceiving? mustn't we be deceiving? mustn't you be deceiving? mustn't they be deceiving?
Perfect	V-ing perfect
mustn't I have deceived? mustn't you have deceived? mustn't she have deceived? mustn't we have deceived? mustn't you have deceived? mustn't they have deceived?	mustn't I have been deceiving? mustn't you have been deceiving? mustn't she have been deceiving? mustn't we have been deceiving? mustn't you have been deceiving? mustn't they have been deceiving?