1 had a quarrel over- - - - 就- - - - 吵了一架
2 whose turn was it to wash dishes?------简单句,特殊疑问句.
whose turn （表语）was （系动词谓语）it （形式主语）to wash dishes（真正主语）
------ it (形式主语)was（系动词谓语） whose turn（表语） to wash dishes （真正主语）
3 whose turn it was to wash dishes.------这是宾语从句的从句部分,it必须放在was的前面.