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