I could log you could log he could log we could log you could log they could log
V-ing form
I could be logging you could be logging he could be logging we could be logging you could be logging they could be logging
Perfect
I could have logged you could have logged he could have logged we could have logged you could have logged they could have logged
V-ing perfect
I could have been logging you could have been logging he could have been logging we could have been logging you could have been logging they could have been logging
Negation
Simple form
I could not log you could not log he could not log we could not log you could not log they could not log
V-ing form
I could not be logging you could not be logging he could not be logging we could not be logging you could not be logging they could not be logging
Perfect
I could not have logged you could not have logged he could not have logged we could not have logged you could not have logged they could not have logged
V-ing perfect
I could not have been logging you could not have been logging he could not have been logging we could not have been logging you could not have been logging they could not have been logging
Interrogative form
Simple form
could I log? could you log? could he log? could we log? could you log? could they log?
V-ing form
could I be logging? could you be logging? could he be logging? could we be logging? could you be logging? could they be logging?
Perfect
could I have logged? could you have logged? could he have logged? could we have logged? could you have logged? could they have logged?
V-ing perfect
could I have been logging? could you have been logging? could he have been logging? could we have been logging? could you have been logging? could they have been logging?
Interro-negative form
Simple form
could I not log? could you not log? could he not log? could we not log? could you not log? could they not log?
V-ing form
could I not be logging? could you not be logging? could he not be logging? could we not be logging? could you not be logging? could they not be logging?
Perfect
could I not have logged? could you not have logged? could he not have logged? could we not have logged? could you not have logged? could they not have logged?
V-ing perfect
could I not have been logging? could you not have been logging? could he not have been logging? could we not have been logging? could you not have been logging? could they not have been logging?