1. As Tess,full of enthusiasm,came downhill towards the dairy,she suddenly heard the milking call,again and again, from all parts of the valley．

【要點解析】這個句子是含有時間狀語的復合句。時間狀語從句是as Tess, full of enthusiasm, came downhill towards the dairy，主句是she suddenly heard the milking call,again and again, from all parts of the valley。

從句中的full of enthusiasm是形容詞短語作伴隨狀況狀語。苔絲come downhill towards the dairy這個動作發生的同時，伴隨著她full of enthusiasm的心里狀態。

主句中的again and again是副詞性短語作時間狀語，from all parts of the valley是借介詞短語做地點狀語。注意時間狀語為地點狀語前面。

2. Tess followed the red and white animals,with their great bags of milk under them,into the farmyard．

【要點解析】with great bags of milk under them是介詞短語定語修飾名詞animals。With在這里的意思是“具有，有”。

3. She saw the long sheds, and the wooden posts, shining and smooth where the cows had rubbed against them over the years．

【要點解析】這是一個含有定語從句的復合句。主句是：She saw the long sheds, and the wooden posts。定語從句是where the cows had rubbed against them over the years。這個從句是有關系副詞”where”引導的分隔式限定性定語從句，修飾表示地點的先行詞 sheds和posts。
在主句和從句中的shining and smooth是形容詞短語作賓語sheds和posts的補足語。