English verb conjugation
COULD UNDECEIVE

Regular verb: undeceive - undeceived - undeceived

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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