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