Could be = more could be = bit There = could have been could have been = links could have been made = more could use = little more would benefit = more although it = would be Could be = links table contents For example there = could be more = overview technology before it it = could have covered More = detail author = could have provided though it = could be organized could have given = links should have been explained = more authors = could show links research paper = could have been put could have covered = than definition ethics