Guys, I have seen many times that favorable GMAT constructions MORE THAN and LESS THEN, and comparative words (smaller, bigger, etc.) are used with some other words, such as EVER, YET, STILL, EVEN, and FAR.
Are there rules of adding such words?
I have seen:
(1) He earns even more than his boss does.
(2) The company's profits grow, but they are still less than they were three years ago.
(3) John has one car; Jack has more, but Mike has yet/still more than both taken together.
(4) More than ever metal scrap will be processed in this year.