[典例]

1). I' m fed up with waiting for her to telephone. 我等她的电话都等得不耐烦了。

2). What' s the matter? You look pretty fed up. 怎麽啦？你显得那麽不高兴。

[短语归纳] feed短语：

feed sb/sth on sth给（人或动物）食物；喂；饲养 feed on（动物）以......为主食

feed sth to sb/sth 给（人或动物）某物作为食物

[练习] 根据句子的要求在括号里填入适当的介词。

1). Several children were feeding bread ________ the ducks.

2). What do you feed your dog ________?

3). Cows feed ________ grass.

4). I' m fed up ________ the same breakfast every morning.

Keys: 1). to 2). on 3). on 4). with

3. look ahead 向前看；为将来谋划

[典例]

Have you looked ahead to what you' ll be doing in five years' time? 你是否想过五年後你要做些什麽?

[短语归纳] look短语：

look back 向后看； 回顾 look out 留神；注意 look into 调查

look up 查找；形势好转；看望 look up to sb. 尊敬 某人 look through 仔细查阅

look forward to sth./doing sth. 盼望 look on 旁观；看作 look over 快速浏览，复习

look down (on/upon sth.) 向下看； 轻视

[练习] 用look短语翻译下面的句子。

1). You should ____________________________________.(翻阅字典查查这个生词).

2). I am looking forward to ________________________ as soon as possible. (收到你的回信)

3). _______________ (当心) or you will catch cold.

4). I have to _______________________ (把笔记复习一遍) for the exam.

Keys: 1). look up the word in a dictionary 2). hearing from you 3). look out 4). look over my notes

4. date back to... = date from... 追溯到......，从......时候开始就有了

[典例]

The church dates back to the 13th century. 这座教堂从十三世纪开始就有了。

[短语归纳]

[练习] 根据句子的要求在括号里填入短语或所给词的适当形式。

1). The custom ________ ________ hundreds of years.

2). Our friendship________ ________ ________ the late 70s.

3). This is a law ________ (date) from the 17th century.

Keys: 1). dates back 2). dates back to 3). dating

Ⅴ.重点句子（旨在提供句子结构等所需材料）

1. We have been excavating layers of ash almost six metres thick, which suggests that they might