I could nasalize you could nasalize he could nasalize we could nasalize you could nasalize they could nasalize
V-ing form
I could be nasalizing you could be nasalizing he could be nasalizing we could be nasalizing you could be nasalizing they could be nasalizing
Perfect
I could have nasalized you could have nasalized he could have nasalized we could have nasalized you could have nasalized they could have nasalized
V-ing perfect
I could have been nasalizing you could have been nasalizing he could have been nasalizing we could have been nasalizing you could have been nasalizing they could have been nasalizing
Negation
Simple form
I could not nasalize you could not nasalize he could not nasalize we could not nasalize you could not nasalize they could not nasalize
V-ing form
I could not be nasalizing you could not be nasalizing he could not be nasalizing we could not be nasalizing you could not be nasalizing they could not be nasalizing
Perfect
I could not have nasalized you could not have nasalized he could not have nasalized we could not have nasalized you could not have nasalized they could not have nasalized
V-ing perfect
I could not have been nasalizing you could not have been nasalizing he could not have been nasalizing we could not have been nasalizing you could not have been nasalizing they could not have been nasalizing
Interrogative form
Simple form
could I nasalize? could you nasalize? could he nasalize? could we nasalize? could you nasalize? could they nasalize?
V-ing form
could I be nasalizing? could you be nasalizing? could he be nasalizing? could we be nasalizing? could you be nasalizing? could they be nasalizing?
Perfect
could I have nasalized? could you have nasalized? could he have nasalized? could we have nasalized? could you have nasalized? could they have nasalized?
V-ing perfect
could I have been nasalizing? could you have been nasalizing? could he have been nasalizing? could we have been nasalizing? could you have been nasalizing? could they have been nasalizing?
Interro-negative form
Simple form
could I not nasalize? could you not nasalize? could he not nasalize? could we not nasalize? could you not nasalize? could they not nasalize?
V-ing form
could I not be nasalizing? could you not be nasalizing? could he not be nasalizing? could we not be nasalizing? could you not be nasalizing? could they not be nasalizing?
Perfect
could I not have nasalized? could you not have nasalized? could he not have nasalized? could we not have nasalized? could you not have nasalized? could they not have nasalized?
V-ing perfect
could I not have been nasalizing? could you not have been nasalizing? could he not have been nasalizing? could we not have been nasalizing? could you not have been nasalizing? could they not have been nasalizing?