1. That's what young Mr d’Urberville is trying to do！

点拨：what young Mr d’Urberville is trying to do是表语从句。

2. Persuaded by her mother and the children，Tess finally agreed to go．

点拨：Persuaded by her mother and the children是过去分词短语做时间状语，可以改为时间状语从句，即：After she was Persuaded by her mother and the children，Tess finally agreed to go。
句中的非谓语动词persuade与主语是被动关系，是说苔丝被家人劝说，所以用过分词短语。

3. Then the day came when Tess，wearing her best Sunday clothes on her mother's orders，said goodbye to her family．

点拨1：when Tess，wearing her best Sunday clothes on her mother's orders，said goodbye to her family是这个句子的定语成分，是一个定语从句，修饰先行词day。Day表示时间，在定语从句中做时间状语，用关系副词when来引导。

这个定语从句属于分隔式定语从句，文中定语从句“when Tess，wearing her best Sunday clothes on her mother's orders，said goodbye to her family”大大地长于谓语“came”，所以将定语从句放置于句末，这样使得句子不显得头重脚轻。

点拨2：在定语从句“when Tess，wearing her best Sunday clothes on her mother's orders，said goodbye to her family”中，“wearing her best Sunday clothes on her mother's orders”是现在分词短语做定语，修饰Tess。