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