I could cloister you could cloister he could cloister we could cloister you could cloister they could cloister
V-ing form
I could be cloistering you could be cloistering he could be cloistering we could be cloistering you could be cloistering they could be cloistering
Perfect
I could have cloistered you could have cloistered he could have cloistered we could have cloistered you could have cloistered they could have cloistered
V-ing perfect
I could have been cloistering you could have been cloistering he could have been cloistering we could have been cloistering you could have been cloistering they could have been cloistering
Negation
Simple form
I could not cloister you could not cloister he could not cloister we could not cloister you could not cloister they could not cloister
V-ing form
I could not be cloistering you could not be cloistering he could not be cloistering we could not be cloistering you could not be cloistering they could not be cloistering
Perfect
I could not have cloistered you could not have cloistered he could not have cloistered we could not have cloistered you could not have cloistered they could not have cloistered
V-ing perfect
I could not have been cloistering you could not have been cloistering he could not have been cloistering we could not have been cloistering you could not have been cloistering they could not have been cloistering
Interrogative form
Simple form
could I cloister? could you cloister? could he cloister? could we cloister? could you cloister? could they cloister?
V-ing form
could I be cloistering? could you be cloistering? could he be cloistering? could we be cloistering? could you be cloistering? could they be cloistering?
Perfect
could I have cloistered? could you have cloistered? could he have cloistered? could we have cloistered? could you have cloistered? could they have cloistered?
V-ing perfect
could I have been cloistering? could you have been cloistering? could he have been cloistering? could we have been cloistering? could you have been cloistering? could they have been cloistering?
Interro-negative form
Simple form
could I not cloister? could you not cloister? could he not cloister? could we not cloister? could you not cloister? could they not cloister?
V-ing form
could I not be cloistering? could you not be cloistering? could he not be cloistering? could we not be cloistering? could you not be cloistering? could they not be cloistering?
Perfect
could I not have cloistered? could you not have cloistered? could he not have cloistered? could we not have cloistered? could you not have cloistered? could they not have cloistered?
V-ing perfect
could I not have been cloistering? could you not have been cloistering? could he not have been cloistering? could we not have been cloistering? could you not have been cloistering? could they not have been cloistering?