I could designate you could designate he could designate we could designate you could designate they could designate
V-ing form
I could be designating you could be designating he could be designating we could be designating you could be designating they could be designating
Perfect
I could have designated you could have designated he could have designated we could have designated you could have designated they could have designated
V-ing perfect
I could have been designating you could have been designating he could have been designating we could have been designating you could have been designating they could have been designating
Negation
Simple form
I could not designate you could not designate he could not designate we could not designate you could not designate they could not designate
V-ing form
I could not be designating you could not be designating he could not be designating we could not be designating you could not be designating they could not be designating
Perfect
I could not have designated you could not have designated he could not have designated we could not have designated you could not have designated they could not have designated
V-ing perfect
I could not have been designating you could not have been designating he could not have been designating we could not have been designating you could not have been designating they could not have been designating
Interrogative form
Simple form
could I designate? could you designate? could he designate? could we designate? could you designate? could they designate?
V-ing form
could I be designating? could you be designating? could he be designating? could we be designating? could you be designating? could they be designating?
Perfect
could I have designated? could you have designated? could he have designated? could we have designated? could you have designated? could they have designated?
V-ing perfect
could I have been designating? could you have been designating? could he have been designating? could we have been designating? could you have been designating? could they have been designating?
Interro-negative form
Simple form
could I not designate? could you not designate? could he not designate? could we not designate? could you not designate? could they not designate?
V-ing form
could I not be designating? could you not be designating? could he not be designating? could we not be designating? could you not be designating? could they not be designating?
Perfect
could I not have designated? could you not have designated? could he not have designated? could we not have designated? could you not have designated? could they not have designated?
V-ing perfect
could I not have been designating? could you not have been designating? could he not have been designating? could we not have been designating? could you not have been designating? could they not have been designating?