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