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