I could interarch you could interarch he could interarch we could interarch you could interarch they could interarch
V-ing form
I could be interarching you could be interarching he could be interarching we could be interarching you could be interarching they could be interarching
Perfect
I could have interarched you could have interarched he could have interarched we could have interarched you could have interarched they could have interarched
V-ing perfect
I could have been interarching you could have been interarching he could have been interarching we could have been interarching you could have been interarching they could have been interarching
Negation
Simple form
I could not interarch you could not interarch he could not interarch we could not interarch you could not interarch they could not interarch
V-ing form
I could not be interarching you could not be interarching he could not be interarching we could not be interarching you could not be interarching they could not be interarching
Perfect
I could not have interarched you could not have interarched he could not have interarched we could not have interarched you could not have interarched they could not have interarched
V-ing perfect
I could not have been interarching you could not have been interarching he could not have been interarching we could not have been interarching you could not have been interarching they could not have been interarching
Interrogative form
Simple form
could I interarch? could you interarch? could he interarch? could we interarch? could you interarch? could they interarch?
V-ing form
could I be interarching? could you be interarching? could he be interarching? could we be interarching? could you be interarching? could they be interarching?
Perfect
could I have interarched? could you have interarched? could he have interarched? could we have interarched? could you have interarched? could they have interarched?
V-ing perfect
could I have been interarching? could you have been interarching? could he have been interarching? could we have been interarching? could you have been interarching? could they have been interarching?
Interro-negative form
Simple form
could I not interarch? could you not interarch? could he not interarch? could we not interarch? could you not interarch? could they not interarch?
V-ing form
could I not be interarching? could you not be interarching? could he not be interarching? could we not be interarching? could you not be interarching? could they not be interarching?
Perfect
could I not have interarched? could you not have interarched? could he not have interarched? could we not have interarched? could you not have interarched? could they not have interarched?
V-ing perfect
could I not have been interarching? could you not have been interarching? could he not have been interarching? could we not have been interarching? could you not have been interarching? could they not have been interarching?