I could encrypt you could encrypt she could encrypt we could encrypt you could encrypt they could encrypt
V-ing form
I could be encrypting you could be encrypting she could be encrypting we could be encrypting you could be encrypting they could be encrypting
Perfect
I could have encrypted you could have encrypted she could have encrypted we could have encrypted you could have encrypted they could have encrypted
V-ing perfect
I could have been encrypting you could have been encrypting she could have been encrypting we could have been encrypting you could have been encrypting they could have been encrypting
Negation
Simple form
I could not encrypt you could not encrypt she could not encrypt we could not encrypt you could not encrypt they could not encrypt
V-ing form
I could not be encrypting you could not be encrypting she could not be encrypting we could not be encrypting you could not be encrypting they could not be encrypting
Perfect
I could not have encrypted you could not have encrypted she could not have encrypted we could not have encrypted you could not have encrypted they could not have encrypted
V-ing perfect
I could not have been encrypting you could not have been encrypting she could not have been encrypting we could not have been encrypting you could not have been encrypting they could not have been encrypting
Interrogative form
Simple form
could I encrypt? could you encrypt? could she encrypt? could we encrypt? could you encrypt? could they encrypt?
V-ing form
could I be encrypting? could you be encrypting? could she be encrypting? could we be encrypting? could you be encrypting? could they be encrypting?
Perfect
could I have encrypted? could you have encrypted? could she have encrypted? could we have encrypted? could you have encrypted? could they have encrypted?
V-ing perfect
could I have been encrypting? could you have been encrypting? could she have been encrypting? could we have been encrypting? could you have been encrypting? could they have been encrypting?
Interro-negative form
Simple form
could I not encrypt? could you not encrypt? could she not encrypt? could we not encrypt? could you not encrypt? could they not encrypt?
V-ing form
could I not be encrypting? could you not be encrypting? could she not be encrypting? could we not be encrypting? could you not be encrypting? could they not be encrypting?
Perfect
could I not have encrypted? could you not have encrypted? could she not have encrypted? could we not have encrypted? could you not have encrypted? could they not have encrypted?
V-ing perfect
could I not have been encrypting? could you not have been encrypting? could she not have been encrypting? could we not have been encrypting? could you not have been encrypting? could they not have been encrypting?