Hello everybody, I came across two different structures in relative clauses and both look evenly spread. I thus wonder if there is any differences between thee following: - Have you read the book that (or which) I sent to you. - Have you read the book that (or which) I sent you. After going through a few grammatical books my only clues are that: - The option 1 is used as such. - The option 2 is used when saying for instance: Have you read the book that I sent you the summary of. Whatever the answer, is it the same principles for give and all the verbs you can use as verb [complement] [complement] or verb [complement] to [complement]? Thanks a lot!