English verb conjugation
COULD ENCODE

Regular verb: encode - encoded - encoded

Affirmation

Simple form	V-ing form
I could encode you could encode he could encode we could encode you could encode they could encode	I could be encoding you could be encoding he could be encoding we could be encoding you could be encoding they could be encoding
Perfect	V-ing perfect
I could have encoded you could have encoded he could have encoded we could have encoded you could have encoded they could have encoded	I could have been encoding you could have been encoding he could have been encoding we could have been encoding you could have been encoding they could have been encoding

Negation

Simple form	V-ing form
I couldn't encode you couldn't encode he couldn't encode we couldn't encode you couldn't encode they couldn't encode	I couldn't be encoding you couldn't be encoding he couldn't be encoding we couldn't be encoding you couldn't be encoding they couldn't be encoding
Perfect	V-ing perfect
I couldn't have encoded you couldn't have encoded he couldn't have encoded we couldn't have encoded you couldn't have encoded they couldn't have encoded	I couldn't have been encoding you couldn't have been encoding he couldn't have been encoding we couldn't have been encoding you couldn't have been encoding they couldn't have been encoding

Interrogative form

Simple form	V-ing form
could I encode? could you encode? could he encode? could we encode? could you encode? could they encode?	could I be encoding? could you be encoding? could he be encoding? could we be encoding? could you be encoding? could they be encoding?
Perfect	V-ing perfect
could I have encoded? could you have encoded? could he have encoded? could we have encoded? could you have encoded? could they have encoded?	could I have been encoding? could you have been encoding? could he have been encoding? could we have been encoding? could you have been encoding? could they have been encoding?

Interro-negative form

Simple form	V-ing form
couldn't I encode? couldn't you encode? couldn't he encode? couldn't we encode? couldn't you encode? couldn't they encode?	couldn't I be encoding? couldn't you be encoding? couldn't he be encoding? couldn't we be encoding? couldn't you be encoding? couldn't they be encoding?
Perfect	V-ing perfect
couldn't I have encoded? couldn't you have encoded? couldn't he have encoded? couldn't we have encoded? couldn't you have encoded? couldn't they have encoded?	couldn't I have been encoding? couldn't you have been encoding? couldn't he have been encoding? couldn't we have been encoding? couldn't you have been encoding? couldn't they have been encoding?