Tom has some problems finding noodles and dumplings.(改为否定句) Tom doesn't have any problems finding noodles and dumplings.Both Jim and Tom are from America.（改为否定句）Neither Jim nor Tom is from...为什么是 nor ？ 这个是啥意思？能告诉下我吗？谢~neither...nor是both...and的否定这是固定搭配，解释为...和...都不