English verb conjugation
MUST UNDECEIVE

Regular verb: undeceive - undeceived - undeceived

Affirmation

Simple form	V-ing form
I must undeceive you must undeceive she must undeceive we must undeceive you must undeceive they must undeceive	I must be undeceiving you must be undeceiving she 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 she 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 she 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 must not undeceive you must not undeceive she must not undeceive we must not undeceive you must not undeceive they must not undeceive	I must not be undeceiving you must not be undeceiving she must not be undeceiving we must not be undeceiving you must not be undeceiving they must not be undeceiving
Perfect	V-ing perfect
I must not have undeceived you must not have undeceived she must not have undeceived we must not have undeceived you must not have undeceived they must not have undeceived	I must not have been undeceiving you must not have been undeceiving she must not have been undeceiving we must not have been undeceiving you must not have been undeceiving they must not have been undeceiving

Interrogative form

Simple form	V-ing form
must I undeceive? must you undeceive? must she undeceive? must we undeceive? must you undeceive? must they undeceive?	must I be undeceiving? must you be undeceiving? must she 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 she 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 she 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
must I not undeceive? must you not undeceive? must she not undeceive? must we not undeceive? must you not undeceive? must they not undeceive?	must I not be undeceiving? must you not be undeceiving? must she not be undeceiving? must we not be undeceiving? must you not be undeceiving? must they not be undeceiving?
Perfect	V-ing perfect
must I not have undeceived? must you not have undeceived? must she not have undeceived? must we not have undeceived? must you not have undeceived? must they not have undeceived?	must I not have been undeceiving? must you not have been undeceiving? must she not have been undeceiving? must we not have been undeceiving? must you not have been undeceiving? must they not have been undeceiving?