I could encode you could encode he could encode we could encode you could encode they could encode
V-ing form
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
I could have encoded you could have encoded he could have encoded we could have encoded you could have encoded they could have encoded
V-ing perfect
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
I could not encode you could not encode he could not encode we could not encode you could not encode they could not encode
V-ing form
I could not be encoding you could not be encoding he could not be encoding we could not be encoding you could not be encoding they could not be encoding
Perfect
I could not have encoded you could not have encoded he could not have encoded we could not have encoded you could not have encoded they could not have encoded
V-ing perfect
I could not have been encoding you could not have been encoding he could not have been encoding we could not have been encoding you could not have been encoding they could not have been encoding
Interrogative form
Simple form
could I encode? could you encode? could he encode? could we encode? could you encode? could they encode?
V-ing form
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
could I have encoded? could you have encoded? could he have encoded? could we have encoded? could you have encoded? could they have encoded?
V-ing perfect
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
could I not encode? could you not encode? could he not encode? could we not encode? could you not encode? could they not encode?
V-ing form
could I not be encoding? could you not be encoding? could he not be encoding? could we not be encoding? could you not be encoding? could they not be encoding?
Perfect
could I not have encoded? could you not have encoded? could he not have encoded? could we not have encoded? could you not have encoded? could they not have encoded?
V-ing perfect
could I not have been encoding? could you not have been encoding? could he not have been encoding? could we not have been encoding? could you not have been encoding? could they not have been encoding?