●过去分词作时间、原因、条件、让步等状语时，可转换为对应的________从句（第2组例句）。

●过去分词作状语，可以在其前加when, although, if, unless等连词，构成"连词+过去分词"结构（第3 组例句）。

【即学即练】用括号内动词的正确形式填空。

1. ________ (tell) many times, he still couldn't understand it.

2. The ________ (reduce) price of eggs can save you one dollar for each dozen.

3. Here are some new computer programs ________ (design) for language learning.

4. ________ (leave) alone in the dark room, the little boy was so frightened that he cried.

5. My father must have been very angry, for we heard the glass ________ (break) on the floor.

6. My teacher seemed quite ________ (satisfy) with my work and praised me in her class.

7. The foreigner tried his best, but he still couldn't make his point ________ (understand).

8. Generally speaking, when ________ (take) according to directions, the drug has no side effect.

答案

【自我归纳】定语；seem；状语

【即学即练】

1. Having been told / Told 2. reduced

3. designed 4. Having been left / Left

5. broken 6. satisfied

7. understood 8. taken

GRAMMAR，Unit 13 Lessons 3-4

I. 从括号内选择合适的内容完成下面句子。