English verb conjugation
MUST UNDECEIVE

Regular verb: undeceive - undeceived - undeceived

Affirmation

Simple form	V-ing form
I must undeceive you must undeceive he must undeceive we must undeceive you must undeceive they must undeceive	I must be undeceiving you must be undeceiving he must be undeceiving we must be undeceiving you must be undeceiving they must be undeceiving
Perfect	V-ing perfect
I must have undeceived you must have undeceived he must have undeceived we must have undeceived you must have undeceived they must have undeceived	I must have been undeceiving you must have been undeceiving he must have been undeceiving we must have been undeceiving you must have been undeceiving they must have been undeceiving

Negation

Simple form	V-ing form
I mustn't undeceive you mustn't undeceive he mustn't undeceive we mustn't undeceive you mustn't undeceive they mustn't undeceive	I mustn't be undeceiving you mustn't be undeceiving he mustn't be undeceiving we mustn't be undeceiving you mustn't be undeceiving they mustn't be undeceiving
Perfect	V-ing perfect
I mustn't have undeceived you mustn't have undeceived he mustn't have undeceived we mustn't have undeceived you mustn't have undeceived they mustn't have undeceived	I mustn't have been undeceiving you mustn't have been undeceiving he mustn't have been undeceiving we mustn't have been undeceiving you mustn't have been undeceiving they mustn't have been undeceiving

Interrogative form

Simple form	V-ing form
must I undeceive? must you undeceive? must he undeceive? must we undeceive? must you undeceive? must they undeceive?	must I be undeceiving? must you be undeceiving? must he be undeceiving? must we be undeceiving? must you be undeceiving? must they be undeceiving?
Perfect	V-ing perfect
must I have undeceived? must you have undeceived? must he have undeceived? must we have undeceived? must you have undeceived? must they have undeceived?	must I have been undeceiving? must you have been undeceiving? must he have been undeceiving? must we have been undeceiving? must you have been undeceiving? must they have been undeceiving?

Interro-negative form

Simple form	V-ing form
mustn't I undeceive? mustn't you undeceive? mustn't he undeceive? mustn't we undeceive? mustn't you undeceive? mustn't they undeceive?	mustn't I be undeceiving? mustn't you be undeceiving? mustn't he be undeceiving? mustn't we be undeceiving? mustn't you be undeceiving? mustn't they be undeceiving?
Perfect	V-ing perfect
mustn't I have undeceived? mustn't you have undeceived? mustn't he have undeceived? mustn't we have undeceived? mustn't you have undeceived? mustn't they have undeceived?	mustn't I have been undeceiving? mustn't you have been undeceiving? mustn't he have been undeceiving? mustn't we have been undeceiving? mustn't you have been undeceiving? mustn't they have been undeceiving?