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第三单元语法学案


课题 授课人 学习目标

B5 Unit3

Grammar 授课时间

授课班级 授课节数

掌握过去分词作状语的用法,并灵活运用。理解过去分词与现在分词及不定式作状语 的区别。

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【观察 1】你能从下列例句中总结出过去分词作状语的使用规律

吗? (1)Seen from the hill, the park looks very beautiful. =When it is seen from the hill, the park looks very beautiful. (2)Compared with you, we still have a long way to go. =If we are compared with you, we still have a long way to go. (3)Greatly touched by his teacher ’s words, the boy did a lot of things to help his classmates. =Because he was greatly touched by his teacher ’s words, the boy did a lot of things to help his classmates. = He was greatly touched by his teacher ’s words, so the boy did a lot of things to help his classmates. (4)Laughed at by the other students, she still tried to answer the question again. =Though she was laughed at by the other students, she still tried to answer the question again. = She was laughed at by the other students, but she still tried to answer the question again. (5)The teacher entered the classroom, followed by a group of his students. = The teacher entered the classroom and he was followed by a group of his students. 【归纳 1】从以上的例句中可以看出: 1.过去分词短语作 2.过去分词短语作 3.过去分词短语作 连接的并列句见例(3) 。 4.过去分词短语作 连接的并列句见例(4) 。 5.过去分词短语作 ,可以改写成 and 连接的并列句,见例(5) 。 【观察 2】请你仔细观察下列三个句子,它们与上述例句有何不同? ( 1 )If caught cheating, the student would be punished. = If he(she) is caught cheating, the student would be punished. (2 )Even if invited, I won’t go. = Even if I am invited, I won’t go. 【归纳 2】 有时为了表明是作何种状语,当从句的主语与主句的主语一致时,常将从句中的 省去,只留下从属连词和过去分词(短语) 。常这样用的从属连词有:if ,though, unless, unless, until, when, while, as if, even if, once, whenever 等。 【观察 3】 请你仔细观察下列两个句子,你能说出过去分词(done)与现在分词完成被动式(having been done)在句中作状语有何不同吗? (1) Deeply moved by the movie, the children began to cry. (2) Having been shown around the library, we were shown around the lab. 【归纳 3】 过去分词(done)与现在分词完成被动式(having been done)在句中作状语的辨析:过去分词作状语侧 重的是 , 即不强调动作在时间的先后; 现在分词的完成被动式侧重的是
1

,相当于 when 引导的 ,相当于 if, unless 引导的 ,相当于 because, as, since 引导的 ,相当于 although, though 引导的

从句,见例(1) 。 从句,见例(2) 。 从句,或改写成 so 从句,或改写成 but

,

既强调动作在时间上的先后。 【观察 4】选用分词作状语时,何时用现在分词,何时用过去分词呢? (1) Seeing nobody at home, I had to leave. (2) Seen from the hill, our school is more beautiful. 【归纳 4】 选用分词作状语时,首先要弄清句子主语和分词之间的逻辑关系,如果句子的主语(分词的逻辑主语) 与分词构成 词构成 【重点提示】 过去分词做状语时,其逻辑主语一般情况下通常是句子的主语。但是,过去分词的逻辑主语若不是句 子的主语时,通常会将逻辑主语保留。这种结构中过去分词带有自己的逻辑主语。这种现象叫分词的独 立结构。只用来做状语表示时间、原因、条件、方式或伴随情况。 The table set, they began to have lunch. 桌子摆好后,他们开始吃午饭。 (表时间) All his money gone, he began to look for a job. 所有的钱用光了,他就开始找工作。 (表原因) All things considered, the meeting had to be put off. 如果全面考虑,会议不得不推迟。 (表条件) 关系,则用现在分词作状语,表 关系,则用过去分词作状语,表 ; 如果句子的主语(分词的逻辑主语)与分 。

[助记] 分词作状语记忆口诀
分词作状语,主语是问题。逗号前后两动作,共用一主语。主语找出后,再来判关系。主动用 –ing, 被动用 –ed, having done 表先后,千万要牢记。 练习用过去分词作状语来改写句子。 1). As I was worried about the journey, I was unsettled for the first few days. → _______________________ , I was unsettled for the first few days. 2). If he is given time, he’ll make a first-class tennis player. → _________ , he’ll make a first-class tennis player. 3). Though Dr. Black was caught in a traffic jam, he managed to get to work on time this morning. → ______________________________, Dr. Black managed to get to work on time this morning. 【考例 1】____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.(2005 年上海卷) A. Put B. Putting C. Having put D. Being put 【考例 2】 ____ by the beauty of nature, the girl from London decided to spend another two days on the farm. (2004 年辽宁卷) A. Attracting B. Attracted C. To be attracted D. Having attracted 收获与疑问 教学反思

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