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