In Section 116 of his book "Practical English Usage" (3rd Edition), Michael Swan says, "Nobody but she..." (i.e., that the use of subject pronoun is possible before a verb) is correct, but in Section 429.2, he says that only an object form is possible in such constructions: "Nobody but me.."
Could someone help me?
Does he give complete sentences we could have a look at?
Section 116: "Nobody but she would do a thing like that." [Here, he says, "Nobody but her would do a thing like that" is synonymous with the earlier sentence, and is equally correct, albeit informal].
Section 429.2:"Nobody but me knew the answer." [But here, he says, "Nobody but I knew the answer" is wrong]