今天，我们继续第三课《分手了！》的学习。从今天开始，我们来咬文嚼字，分析这一课中对话每一个句子的语法现象。

1. She busted him when she walked into their bedroom and found him with some tramp.

解析1：这是一个含有时间状语从句的符合句。主句是“she busted him”，从句是“when she walked into their bedroom and found him with some tramp”，when是时间副词，表示时间。

解析2：“She walked into their bedroom and found him with some tramp.”中的“and”是连词，在这里表示“结果”，用中文说则是：结果是，就。例如：

Miss another class and you will fail in the exam. 在缺一次课，你考试就会不及格。

解析3：“She walked into their bedroom and found him with some tramp.”中的“found him with some tramp”这个结构是find+宾语+介词短语，表示“发现某人做某事”。这个介词短语“with some tramp”是做宾语的补足语，补充说明某人在做什么事情。

2. Jane must have been so upset.

解析：这个句子使用了虚拟语气。“must have been so upset”是“must have done something”这个结构，它用于表示对过去发生的事情的非常肯定的猜测。在对话中，Jennifer非常肯定地猜想到Jane因为发现Mike与外人有染的事情而心烦。再如：

It must have been a valuable experience. 那准是有价值的所见所闻了。

Something must have gone amiss, so he's not here to meet us. 准是出了什和差错，他没来这里接我们。

解析2：upset是形容词，表示“因为某事而烦心”，介词用“at”。例如：

He was upset at not being invited. 人家没邀请他，他很不痛快。