What do you think we can do to preserve the great books of the past?
There is only one thing you can do to preserve the great books from the past. You can buy the books and keep them.
(The past tense of read, pronounced "reed", is also read, pronounced "red".) (past) "He read most of the books in the small library." (past perfect) "He has read most of the books in the library." (past continuous) "He was reading the books." (past perfect continuous) "He had been reading books at the library every weekend." --- Occasionally individual sentences may not be obviously present or past: "I read the books every Saturday." (reed or red)