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<正> 1.有时先行词与定语从句被分隔:What have I said that makes you so angry?我说什么了,把你气成这个样?(上句中的先行词 what 与定语从句 that makes you so angry 被主句的主语和谓语 have I said 分隔。)During construction,problems often arise which require design changes.在施工过程中,常会出现需要改变设计的问题。