what about 后加to还是doing

what about 后加to还是doing what about加doing还是to do How/What about 后是否加doing think about 加 to do 还是doing? what about doing sth还是what about to do sth never后加doing还是to do enough后加doing还是to do suggest 后加doing 还是to do due to 后加do还是doing choose后加to do还是doing subscribe to后加doing还是do think about 后加doing sth.还是 do sth.