English verb conjugation
COULD UNDECEIVE

Regular verb: undeceive - undeceived - undeceived

Affirmation

Simple form	V-ing form
I could undeceive you could undeceive he could undeceive we could undeceive you could undeceive they could undeceive	I could be undeceiving you could be undeceiving he 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 he 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 he 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 he 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 he 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 he 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 he 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 he undeceive? could we undeceive? could you undeceive? could they undeceive?	could I be undeceiving? could you be undeceiving? could he 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 he 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 he 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 he 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 he 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 he 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 he have been undeceiving? couldn't we have been undeceiving? couldn't you have been undeceiving? couldn't they have been undeceiving?