I could betake you could betake he could betake we could betake you could betake they could betake
V-ing form
I could be betaking you could be betaking he could be betaking we could be betaking you could be betaking they could be betaking
Perfect
I could have betaken you could have betaken he could have betaken we could have betaken you could have betaken they could have betaken
V-ing perfect
I could have been betaking you could have been betaking he could have been betaking we could have been betaking you could have been betaking they could have been betaking
Negation
Simple form
I couldn't betake you couldn't betake he couldn't betake we couldn't betake you couldn't betake they couldn't betake
V-ing form
I couldn't be betaking you couldn't be betaking he couldn't be betaking we couldn't be betaking you couldn't be betaking they couldn't be betaking
Perfect
I couldn't have betaken you couldn't have betaken he couldn't have betaken we couldn't have betaken you couldn't have betaken they couldn't have betaken
V-ing perfect
I couldn't have been betaking you couldn't have been betaking he couldn't have been betaking we couldn't have been betaking you couldn't have been betaking they couldn't have been betaking
Interrogative form
Simple form
could I betake? could you betake? could he betake? could we betake? could you betake? could they betake?
V-ing form
could I be betaking? could you be betaking? could he be betaking? could we be betaking? could you be betaking? could they be betaking?
Perfect
could I have betaken? could you have betaken? could he have betaken? could we have betaken? could you have betaken? could they have betaken?
V-ing perfect
could I have been betaking? could you have been betaking? could he have been betaking? could we have been betaking? could you have been betaking? could they have been betaking?
Interro-negative form
Simple form
couldn't I betake? couldn't you betake? couldn't he betake? couldn't we betake? couldn't you betake? couldn't they betake?
V-ing form
couldn't I be betaking? couldn't you be betaking? couldn't he be betaking? couldn't we be betaking? couldn't you be betaking? couldn't they be betaking?
Perfect
couldn't I have betaken? couldn't you have betaken? couldn't he have betaken? couldn't we have betaken? couldn't you have betaken? couldn't they have betaken?
V-ing perfect
couldn't I have been betaking? couldn't you have been betaking? couldn't he have been betaking? couldn't we have been betaking? couldn't you have been betaking? couldn't they have been betaking?