I could preregulate you could preregulate she could preregulate we could preregulate you could preregulate they could preregulate
V-ing form
I could be preregulating you could be preregulating she could be preregulating we could be preregulating you could be preregulating they could be preregulating
Perfect
I could have preregulated you could have preregulated she could have preregulated we could have preregulated you could have preregulated they could have preregulated
V-ing perfect
I could have been preregulating you could have been preregulating she could have been preregulating we could have been preregulating you could have been preregulating they could have been preregulating
Negation
Simple form
I could not preregulate you could not preregulate she could not preregulate we could not preregulate you could not preregulate they could not preregulate
V-ing form
I could not be preregulating you could not be preregulating she could not be preregulating we could not be preregulating you could not be preregulating they could not be preregulating
Perfect
I could not have preregulated you could not have preregulated she could not have preregulated we could not have preregulated you could not have preregulated they could not have preregulated
V-ing perfect
I could not have been preregulating you could not have been preregulating she could not have been preregulating we could not have been preregulating you could not have been preregulating they could not have been preregulating
Interrogative form
Simple form
could I preregulate? could you preregulate? could she preregulate? could we preregulate? could you preregulate? could they preregulate?
V-ing form
could I be preregulating? could you be preregulating? could she be preregulating? could we be preregulating? could you be preregulating? could they be preregulating?
Perfect
could I have preregulated? could you have preregulated? could she have preregulated? could we have preregulated? could you have preregulated? could they have preregulated?
V-ing perfect
could I have been preregulating? could you have been preregulating? could she have been preregulating? could we have been preregulating? could you have been preregulating? could they have been preregulating?
Interro-negative form
Simple form
could I not preregulate? could you not preregulate? could she not preregulate? could we not preregulate? could you not preregulate? could they not preregulate?
V-ing form
could I not be preregulating? could you not be preregulating? could she not be preregulating? could we not be preregulating? could you not be preregulating? could they not be preregulating?
Perfect
could I not have preregulated? could you not have preregulated? could she not have preregulated? could we not have preregulated? could you not have preregulated? could they not have preregulated?
V-ing perfect
could I not have been preregulating? could you not have been preregulating? could she not have been preregulating? could we not have been preregulating? could you not have been preregulating? could they not have been preregulating?