I could fray you could fray he could fray we could fray you could fray they could fray
V-ing form
I could be fraying you could be fraying he could be fraying we could be fraying you could be fraying they could be fraying
Perfect
I could have frayed you could have frayed he could have frayed we could have frayed you could have frayed they could have frayed
V-ing perfect
I could have been fraying you could have been fraying he could have been fraying we could have been fraying you could have been fraying they could have been fraying
Negation
Simple form
I could not fray you could not fray he could not fray we could not fray you could not fray they could not fray
V-ing form
I could not be fraying you could not be fraying he could not be fraying we could not be fraying you could not be fraying they could not be fraying
Perfect
I could not have frayed you could not have frayed he could not have frayed we could not have frayed you could not have frayed they could not have frayed
V-ing perfect
I could not have been fraying you could not have been fraying he could not have been fraying we could not have been fraying you could not have been fraying they could not have been fraying
Interrogative form
Simple form
could I fray? could you fray? could he fray? could we fray? could you fray? could they fray?
V-ing form
could I be fraying? could you be fraying? could he be fraying? could we be fraying? could you be fraying? could they be fraying?
Perfect
could I have frayed? could you have frayed? could he have frayed? could we have frayed? could you have frayed? could they have frayed?
V-ing perfect
could I have been fraying? could you have been fraying? could he have been fraying? could we have been fraying? could you have been fraying? could they have been fraying?
Interro-negative form
Simple form
could I not fray? could you not fray? could he not fray? could we not fray? could you not fray? could they not fray?
V-ing form
could I not be fraying? could you not be fraying? could he not be fraying? could we not be fraying? could you not be fraying? could they not be fraying?
Perfect
could I not have frayed? could you not have frayed? could he not have frayed? could we not have frayed? could you not have frayed? could they not have frayed?
V-ing perfect
could I not have been fraying? could you not have been fraying? could he not have been fraying? could we not have been fraying? could you not have been fraying? could they not have been fraying?