I could arabise you could arabise he could arabise we could arabise you could arabise they could arabise
V-ing form
I could be arabising you could be arabising he could be arabising we could be arabising you could be arabising they could be arabising
Perfect
I could have arabised you could have arabised he could have arabised we could have arabised you could have arabised they could have arabised
V-ing perfect
I could have been arabising you could have been arabising he could have been arabising we could have been arabising you could have been arabising they could have been arabising
Negation
Simple form
I could not arabise you could not arabise he could not arabise we could not arabise you could not arabise they could not arabise
V-ing form
I could not be arabising you could not be arabising he could not be arabising we could not be arabising you could not be arabising they could not be arabising
Perfect
I could not have arabised you could not have arabised he could not have arabised we could not have arabised you could not have arabised they could not have arabised
V-ing perfect
I could not have been arabising you could not have been arabising he could not have been arabising we could not have been arabising you could not have been arabising they could not have been arabising
Interrogative form
Simple form
could I arabise? could you arabise? could he arabise? could we arabise? could you arabise? could they arabise?
V-ing form
could I be arabising? could you be arabising? could he be arabising? could we be arabising? could you be arabising? could they be arabising?
Perfect
could I have arabised? could you have arabised? could he have arabised? could we have arabised? could you have arabised? could they have arabised?
V-ing perfect
could I have been arabising? could you have been arabising? could he have been arabising? could we have been arabising? could you have been arabising? could they have been arabising?
Interro-negative form
Simple form
could I not arabise? could you not arabise? could he not arabise? could we not arabise? could you not arabise? could they not arabise?
V-ing form
could I not be arabising? could you not be arabising? could he not be arabising? could we not be arabising? could you not be arabising? could they not be arabising?
Perfect
could I not have arabised? could you not have arabised? could he not have arabised? could we not have arabised? could you not have arabised? could they not have arabised?
V-ing perfect
could I not have been arabising? could you not have been arabising? could he not have been arabising? could we not have been arabising? could you not have been arabising? could they not have been arabising?