The bull was busy with the matador at the time 句子成分

The bull （主）was busy with（谓,系表） the matador（宾） at the time（时间状语）
再问： 谓，系表 什么意思 那

but it suddenly caught sight of the drunk who was shouting rude remarks and waving a red cap句成
再答： 系表结构，自己查。。。
but it（主，the bull） suddenly caught sight of the drunk(宾) who was shouting rude remarks and waving a red cap（宾语从句）

用who引导的从句 the drunk was shouting rude remarks and waving a red cap
再问： Apparently sensitive to criticism,the bull forgot all about the matador and charged at drunk成分
再答： Apparently sensitive to criticism（原因状语）,the bull（主） forgot （谓）all about the matador （宾）and charged（跟forget一样并列的谓语） at drunk（个人觉得是不是the drunk？特指）

话说，你为啥老纠结这个。。。。。
再问： 老师让的呀没办法，总之谢谢您