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