English verb conjugation
COULD SIGNALIZE

Regular verb: signalize - signalized - signalized

Affirmation

Simple form	V-ing form
I could signalize you could signalize she could signalize we could signalize you could signalize they could signalize	I could be signalizing you could be signalizing she could be signalizing we could be signalizing you could be signalizing they could be signalizing
Perfect	V-ing perfect
I could have signalized you could have signalized she could have signalized we could have signalized you could have signalized they could have signalized	I could have been signalizing you could have been signalizing she could have been signalizing we could have been signalizing you could have been signalizing they could have been signalizing

Negation

Simple form	V-ing form
I couldn't signalize you couldn't signalize she couldn't signalize we couldn't signalize you couldn't signalize they couldn't signalize	I couldn't be signalizing you couldn't be signalizing she couldn't be signalizing we couldn't be signalizing you couldn't be signalizing they couldn't be signalizing
Perfect	V-ing perfect
I couldn't have signalized you couldn't have signalized she couldn't have signalized we couldn't have signalized you couldn't have signalized they couldn't have signalized	I couldn't have been signalizing you couldn't have been signalizing she couldn't have been signalizing we couldn't have been signalizing you couldn't have been signalizing they couldn't have been signalizing

Interrogative form

Simple form	V-ing form
could I signalize? could you signalize? could she signalize? could we signalize? could you signalize? could they signalize?	could I be signalizing? could you be signalizing? could she be signalizing? could we be signalizing? could you be signalizing? could they be signalizing?
Perfect	V-ing perfect
could I have signalized? could you have signalized? could she have signalized? could we have signalized? could you have signalized? could they have signalized?	could I have been signalizing? could you have been signalizing? could she have been signalizing? could we have been signalizing? could you have been signalizing? could they have been signalizing?

Interro-negative form

Simple form	V-ing form
couldn't I signalize? couldn't you signalize? couldn't she signalize? couldn't we signalize? couldn't you signalize? couldn't they signalize?	couldn't I be signalizing? couldn't you be signalizing? couldn't she be signalizing? couldn't we be signalizing? couldn't you be signalizing? couldn't they be signalizing?
Perfect	V-ing perfect
couldn't I have signalized? couldn't you have signalized? couldn't she have signalized? couldn't we have signalized? couldn't you have signalized? couldn't they have signalized?	couldn't I have been signalizing? couldn't you have been signalizing? couldn't she have been signalizing? couldn't we have been signalizing? couldn't you have been signalizing? couldn't they have been signalizing?