I'm tired of wondering why hasn't he called,为什么不是I'm tired o

你的理解是对的,这里的用法不符合英语语法,但在口语里,语法不那麽严格
这句话出自：
Monica:I'm just so tired of missing him.I'm tired of wondering why hasn't he called.Why hasn't he called?!
我厌烦了想他,我厌烦了琢磨他会不会打电话来…他为什么还没打电话来?!
你看,她最后又用了一个“Why hasn't he called?!” == 正常的问句.由此可以理解,前一个做重句的 "why hasn't he called",是她心不在焉时说的,没过脑子.