标签：外研版高一英语教案范文,高一英语教案设计,
教学
下学期 Unit 20 Mainly revision－教学教案,
By the first century the making of paper in some parts of China had been well developed and had become common. 到了公元一世纪，中国有些地区造纸业已十分发达并且变得普遍了。
本句有两个并列谓语，都用了过去完成时态（had been well developed和had become common），表示在过去某一时间之前已经发生的动作。这一过去时间是通过介词by的短语(By the first century)来表示的。又如：
She had not finished her report by yesterday afternoon. 到昨天下午为止，她还没有写完报告。
By the end of last week all the plans had been made. 到上周末为止，所有的计划都订出来了。
They carved a whole page of characters back to front in the wood
“back to front” 是一个合成词，作“反面地”解，在句中作状语，修饰动词carved。
这种合成词是“名词+介词+名词”构成。词与词之间应有连字符连接，如：
如face-to-face（面对面）、back-to-back（背面背）
side-by-side（肩并肩）、hand-in-hand (手牵手)等
这种合成词在句中多作定语；词与词之间无连字符连接、多作状语。例如：
The boy has his sweater on back to front.
He came face to face with death.
Although these were much more useful than the metal pots, they were still difficult to read and were very heavy to carry. 和
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，下学期 Unit 20 Mainly revision－教学教案
