This message was originally submitted by [log in to unmask] to the ATEG list hi, Could someone help me out here with this grammar lesson. I teach English as a second language: in the following two sentences: "I don't know who(m) I saw last night". "I like the girl who(m) i saw last night. ok, the above two, to my feeble understanding, both contain relative clauses which are, 1-defining 2-and both have the relative pronoun as object therefore they should, in both cases, be capable of being omitted. Doesn't seem to work with sentence one. ok, so it looks like, in sentence one, that the relative clause is the object of the verb itself (know), but still, isn't it a relative clause the object of the verb "saw" being "who(m)?? thanks, eric