I could bucket you could bucket he could bucket we could bucket you could bucket they could bucket
V-ing form
I could be bucketing you could be bucketing he could be bucketing we could be bucketing you could be bucketing they could be bucketing
Perfect
I could have bucketed you could have bucketed he could have bucketed we could have bucketed you could have bucketed they could have bucketed
V-ing perfect
I could have been bucketing you could have been bucketing he could have been bucketing we could have been bucketing you could have been bucketing they could have been bucketing
Negation
Simple form
I could not bucket you could not bucket he could not bucket we could not bucket you could not bucket they could not bucket
V-ing form
I could not be bucketing you could not be bucketing he could not be bucketing we could not be bucketing you could not be bucketing they could not be bucketing
Perfect
I could not have bucketed you could not have bucketed he could not have bucketed we could not have bucketed you could not have bucketed they could not have bucketed
V-ing perfect
I could not have been bucketing you could not have been bucketing he could not have been bucketing we could not have been bucketing you could not have been bucketing they could not have been bucketing
Interrogative form
Simple form
could I bucket? could you bucket? could he bucket? could we bucket? could you bucket? could they bucket?
V-ing form
could I be bucketing? could you be bucketing? could he be bucketing? could we be bucketing? could you be bucketing? could they be bucketing?
Perfect
could I have bucketed? could you have bucketed? could he have bucketed? could we have bucketed? could you have bucketed? could they have bucketed?
V-ing perfect
could I have been bucketing? could you have been bucketing? could he have been bucketing? could we have been bucketing? could you have been bucketing? could they have been bucketing?
Interro-negative form
Simple form
could I not bucket? could you not bucket? could he not bucket? could we not bucket? could you not bucket? could they not bucket?
V-ing form
could I not be bucketing? could you not be bucketing? could he not be bucketing? could we not be bucketing? could you not be bucketing? could they not be bucketing?
Perfect
could I not have bucketed? could you not have bucketed? could he not have bucketed? could we not have bucketed? could you not have bucketed? could they not have bucketed?
V-ing perfect
could I not have been bucketing? could you not have been bucketing? could he not have been bucketing? could we not have been bucketing? could you not have been bucketing? could they not have been bucketing?