I could easternise you could easternise he could easternise we could easternise you could easternise they could easternise
V-ing form
I could be easternising you could be easternising he could be easternising we could be easternising you could be easternising they could be easternising
Perfect
I could have easternised you could have easternised he could have easternised we could have easternised you could have easternised they could have easternised
V-ing perfect
I could have been easternising you could have been easternising he could have been easternising we could have been easternising you could have been easternising they could have been easternising
Negation
Simple form
I could not easternise you could not easternise he could not easternise we could not easternise you could not easternise they could not easternise
V-ing form
I could not be easternising you could not be easternising he could not be easternising we could not be easternising you could not be easternising they could not be easternising
Perfect
I could not have easternised you could not have easternised he could not have easternised we could not have easternised you could not have easternised they could not have easternised
V-ing perfect
I could not have been easternising you could not have been easternising he could not have been easternising we could not have been easternising you could not have been easternising they could not have been easternising
Interrogative form
Simple form
could I easternise? could you easternise? could he easternise? could we easternise? could you easternise? could they easternise?
V-ing form
could I be easternising? could you be easternising? could he be easternising? could we be easternising? could you be easternising? could they be easternising?
Perfect
could I have easternised? could you have easternised? could he have easternised? could we have easternised? could you have easternised? could they have easternised?
V-ing perfect
could I have been easternising? could you have been easternising? could he have been easternising? could we have been easternising? could you have been easternising? could they have been easternising?
Interro-negative form
Simple form
could I not easternise? could you not easternise? could he not easternise? could we not easternise? could you not easternise? could they not easternise?
V-ing form
could I not be easternising? could you not be easternising? could he not be easternising? could we not be easternising? could you not be easternising? could they not be easternising?
Perfect
could I not have easternised? could you not have easternised? could he not have easternised? could we not have easternised? could you not have easternised? could they not have easternised?
V-ing perfect
could I not have been easternising? could you not have been easternising? could he not have been easternising? could we not have been easternising? could you not have been easternising? could they not have been easternising?