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 can't log you can't log he can't log we can't log you can't log they can't log
V-ing form
I can't be logging you can't be logging he can't be logging we can't be logging you can't be logging they can't be logging
Perfect
I can't have logged you can't have logged he can't have logged we can't have logged you can't have logged they can't have logged
V-ing perfect
I can't have been logging you can't have been logging he can't have been logging we can't have been logging you can't have been logging they can't 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't I log? can't you log? can't he log? can't we log? can't you log? can't they log?
V-ing form
can't I be logging? can't you be logging? can't he be logging? can't we be logging? can't you be logging? can't they be logging?
Perfect
can't I have logged? can't you have logged? can't he have logged? can't we have logged? can't you have logged? can't they have logged?
V-ing perfect
can't I have been logging? can't you have been logging? can't he have been logging? can't we have been logging? can't you have been logging? can't they have been logging?