I could signalize you could signalize he could signalize we could signalize you could signalize they could signalize
V-ing form
I could be signalizing you could be signalizing he could be signalizing we could be signalizing you could be signalizing they could be signalizing
Perfect
I could have signalized you could have signalized he could have signalized we could have signalized you could have signalized they could have signalized
V-ing perfect
I could have been signalizing you could have been signalizing he could have been signalizing we could have been signalizing you could have been signalizing they could have been signalizing
Negation
Simple form
I could not signalize you could not signalize he could not signalize we could not signalize you could not signalize they could not signalize
V-ing form
I could not be signalizing you could not be signalizing he could not be signalizing we could not be signalizing you could not be signalizing they could not be signalizing
Perfect
I could not have signalized you could not have signalized he could not have signalized we could not have signalized you could not have signalized they could not have signalized
V-ing perfect
I could not have been signalizing you could not have been signalizing he could not have been signalizing we could not have been signalizing you could not have been signalizing they could not have been signalizing
Interrogative form
Simple form
could I signalize? could you signalize? could he signalize? could we signalize? could you signalize? could they signalize?
V-ing form
could I be signalizing? could you be signalizing? could he be signalizing? could we be signalizing? could you be signalizing? could they be signalizing?
Perfect
could I have signalized? could you have signalized? could he have signalized? could we have signalized? could you have signalized? could they have signalized?
V-ing perfect
could I have been signalizing? could you have been signalizing? could he have been signalizing? could we have been signalizing? could you have been signalizing? could they have been signalizing?
Interro-negative form
Simple form
could I not signalize? could you not signalize? could he not signalize? could we not signalize? could you not signalize? could they not signalize?
V-ing form
could I not be signalizing? could you not be signalizing? could he not be signalizing? could we not be signalizing? could you not be signalizing? could they not be signalizing?
Perfect
could I not have signalized? could you not have signalized? could he not have signalized? could we not have signalized? could you not have signalized? could they not have signalized?
V-ing perfect
could I not have been signalizing? could you not have been signalizing? could he not have been signalizing? could we not have been signalizing? could you not have been signalizing? could they not have been signalizing?