I could socialize you could socialize he could socialize we could socialize you could socialize they could socialize
V-ing form
I could be socializing you could be socializing he could be socializing we could be socializing you could be socializing they could be socializing
Perfect
I could have socialized you could have socialized he could have socialized we could have socialized you could have socialized they could have socialized
V-ing perfect
I could have been socializing you could have been socializing he could have been socializing we could have been socializing you could have been socializing they could have been socializing
Negation
Simple form
I couldn't socialize you couldn't socialize he couldn't socialize we couldn't socialize you couldn't socialize they couldn't socialize
V-ing form
I couldn't be socializing you couldn't be socializing he couldn't be socializing we couldn't be socializing you couldn't be socializing they couldn't be socializing
Perfect
I couldn't have socialized you couldn't have socialized he couldn't have socialized we couldn't have socialized you couldn't have socialized they couldn't have socialized
V-ing perfect
I couldn't have been socializing you couldn't have been socializing he couldn't have been socializing we couldn't have been socializing you couldn't have been socializing they couldn't have been socializing
Interrogative form
Simple form
could I socialize? could you socialize? could he socialize? could we socialize? could you socialize? could they socialize?
V-ing form
could I be socializing? could you be socializing? could he be socializing? could we be socializing? could you be socializing? could they be socializing?
Perfect
could I have socialized? could you have socialized? could he have socialized? could we have socialized? could you have socialized? could they have socialized?
V-ing perfect
could I have been socializing? could you have been socializing? could he have been socializing? could we have been socializing? could you have been socializing? could they have been socializing?
Interro-negative form
Simple form
couldn't I socialize? couldn't you socialize? couldn't he socialize? couldn't we socialize? couldn't you socialize? couldn't they socialize?
V-ing form
couldn't I be socializing? couldn't you be socializing? couldn't he be socializing? couldn't we be socializing? couldn't you be socializing? couldn't they be socializing?
Perfect
couldn't I have socialized? couldn't you have socialized? couldn't he have socialized? couldn't we have socialized? couldn't you have socialized? couldn't they have socialized?
V-ing perfect
couldn't I have been socializing? couldn't you have been socializing? couldn't he have been socializing? couldn't we have been socializing? couldn't you have been socializing? couldn't they have been socializing?