I could log you could log she could log we could log you could log they could log
V-ing form
I could be logging you could be logging she could be logging we could be logging you could be logging they could be logging
Perfect
I could have logged you could have logged she 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 she could have been logging we could have been logging you could have been logging they could have been logging
Negation
Simple form
I couldn't log you couldn't log she couldn't log we couldn't log you couldn't log they couldn't log
V-ing form
I couldn't be logging you couldn't be logging she couldn't be logging we couldn't be logging you couldn't be logging they couldn't be logging
Perfect
I couldn't have logged you couldn't have logged she couldn't have logged we couldn't have logged you couldn't have logged they couldn't have logged
V-ing perfect
I couldn't have been logging you couldn't have been logging she couldn't have been logging we couldn't have been logging you couldn't have been logging they couldn't have been logging
Interrogative form
Simple form
could I log? could you log? could she log? could we log? could you log? could they log?
V-ing form
could I be logging? could you be logging? could she be logging? could we be logging? could you be logging? could they be logging?
Perfect
could I have logged? could you have logged? could she 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 she have been logging? could we have been logging? could you have been logging? could they have been logging?
Interro-negative form
Simple form
couldn't I log? couldn't you log? couldn't she log? couldn't we log? couldn't you log? couldn't they log?
V-ing form
couldn't I be logging? couldn't you be logging? couldn't she be logging? couldn't we be logging? couldn't you be logging? couldn't they be logging?
Perfect
couldn't I have logged? couldn't you have logged? couldn't she have logged? couldn't we have logged? couldn't you have logged? couldn't they have logged?
V-ing perfect
couldn't I have been logging? couldn't you have been logging? couldn't she have been logging? couldn't we have been logging? couldn't you have been logging? couldn't they have been logging?