1.I would have read more as a child if I hadn't had a TV. Unfortunately, I did have a TV, so I never read for entertainment.
2.you should have read by now should be engrossing, but at the same time have some degree of cultural relevance.
3.I keep thinking if only those people could have read your book before they destroyed themselves
4.you must have cought your train if you had run
5.An article that you may have read already