English verb conjugation
COULD DECEIVE

Regular verb: deceive - deceived - deceived

Affirmation

Simple form	V-ing form
I could deceive you could deceive he could deceive we could deceive you could deceive they could deceive	I could be deceiving you could be deceiving he could be deceiving we could be deceiving you could be deceiving they could be deceiving
Perfect	V-ing perfect
I could have deceived you could have deceived he could have deceived we could have deceived you could have deceived they could have deceived	I could have been deceiving you could have been deceiving he could have been deceiving we could have been deceiving you could have been deceiving they could have been deceiving

Negation

Simple form	V-ing form
I couldn't deceive you couldn't deceive he couldn't deceive we couldn't deceive you couldn't deceive they couldn't deceive	I couldn't be deceiving you couldn't be deceiving he couldn't be deceiving we couldn't be deceiving you couldn't be deceiving they couldn't be deceiving
Perfect	V-ing perfect
I couldn't have deceived you couldn't have deceived he couldn't have deceived we couldn't have deceived you couldn't have deceived they couldn't have deceived	I couldn't have been deceiving you couldn't have been deceiving he couldn't have been deceiving we couldn't have been deceiving you couldn't have been deceiving they couldn't have been deceiving

Interrogative form

Simple form	V-ing form
could I deceive? could you deceive? could he deceive? could we deceive? could you deceive? could they deceive?	could I be deceiving? could you be deceiving? could he be deceiving? could we be deceiving? could you be deceiving? could they be deceiving?
Perfect	V-ing perfect
could I have deceived? could you have deceived? could he have deceived? could we have deceived? could you have deceived? could they have deceived?	could I have been deceiving? could you have been deceiving? could he have been deceiving? could we have been deceiving? could you have been deceiving? could they have been deceiving?

Interro-negative form

Simple form	V-ing form
couldn't I deceive? couldn't you deceive? couldn't he deceive? couldn't we deceive? couldn't you deceive? couldn't they deceive?	couldn't I be deceiving? couldn't you be deceiving? couldn't he be deceiving? couldn't we be deceiving? couldn't you be deceiving? couldn't they be deceiving?
Perfect	V-ing perfect
couldn't I have deceived? couldn't you have deceived? couldn't he have deceived? couldn't we have deceived? couldn't you have deceived? couldn't they have deceived?	couldn't I have been deceiving? couldn't you have been deceiving? couldn't he have been deceiving? couldn't we have been deceiving? couldn't you have been deceiving? couldn't they have been deceiving?