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