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