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