I could beg you could beg he could beg we could beg you could beg they could beg
V-ing form
I could be begging you could be begging he could be begging we could be begging you could be begging they could be begging
Perfect
I could have begged you could have begged he could have begged we could have begged you could have begged they could have begged
V-ing perfect
I could have been begging you could have been begging he could have been begging we could have been begging you could have been begging they could have been begging
Negation
Simple form
I could not beg you could not beg he could not beg we could not beg you could not beg they could not beg
V-ing form
I could not be begging you could not be begging he could not be begging we could not be begging you could not be begging they could not be begging
Perfect
I could not have begged you could not have begged he could not have begged we could not have begged you could not have begged they could not have begged
V-ing perfect
I could not have been begging you could not have been begging he could not have been begging we could not have been begging you could not have been begging they could not have been begging
Interrogative form
Simple form
could I beg? could you beg? could he beg? could we beg? could you beg? could they beg?
V-ing form
could I be begging? could you be begging? could he be begging? could we be begging? could you be begging? could they be begging?
Perfect
could I have begged? could you have begged? could he have begged? could we have begged? could you have begged? could they have begged?
V-ing perfect
could I have been begging? could you have been begging? could he have been begging? could we have been begging? could you have been begging? could they have been begging?
Interro-negative form
Simple form
could I not beg? could you not beg? could he not beg? could we not beg? could you not beg? could they not beg?
V-ing form
could I not be begging? could you not be begging? could he not be begging? could we not be begging? could you not be begging? could they not be begging?
Perfect
could I not have begged? could you not have begged? could he not have begged? could we not have begged? could you not have begged? could they not have begged?
V-ing perfect
could I not have been begging? could you not have been begging? could he not have been begging? could we not have been begging? could you not have been begging? could they not have been begging?