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 couldn't undeceive you couldn't undeceive she couldn't undeceive we couldn't undeceive you couldn't undeceive they couldn't undeceive	I couldn't be undeceiving you couldn't be undeceiving she couldn't be undeceiving we couldn't be undeceiving you couldn't be undeceiving they couldn't be undeceiving
Perfect	V-ing perfect
I couldn't have undeceived you couldn't have undeceived she couldn't have undeceived we couldn't have undeceived you couldn't have undeceived they couldn't have undeceived	I couldn't have been undeceiving you couldn't have been undeceiving she couldn't have been undeceiving we couldn't have been undeceiving you couldn't have been undeceiving they couldn't 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
couldn't I undeceive? couldn't you undeceive? couldn't she undeceive? couldn't we undeceive? couldn't you undeceive? couldn't they undeceive?	couldn't I be undeceiving? couldn't you be undeceiving? couldn't she be undeceiving? couldn't we be undeceiving? couldn't you be undeceiving? couldn't they be undeceiving?
Perfect	V-ing perfect
couldn't I have undeceived? couldn't you have undeceived? couldn't she have undeceived? couldn't we have undeceived? couldn't you have undeceived? couldn't they have undeceived?	couldn't I have been undeceiving? couldn't you have been undeceiving? couldn't she have been undeceiving? couldn't we have been undeceiving? couldn't you have been undeceiving? couldn't they have been undeceiving?