高中英语选修七Unit3 Under the sea Period 4教案 3页

Period 4　Grammar Teaching aims　　　　　‎ ‎1．Students will be able to recognize the －ing/being done forms and know the exact meanings of them.‎ ‎2．Students will be able to use these two forms correctly.‎ Teaching procedures　　　　　‎ Step 1　Revision ‎ Ask students to answer the following questions without referring to the textbook.‎ ‎1．What did Clancy witness when he ran down to the shore?‎ ‎2．Why did Clancy run in a hurry?‎ ‎3．What did Old Tom do when they headed into the bay?‎ ‎4．What did Old Tom do after George beat the water?‎ ‎5．What did Clancy witness when they drew near?‎ Suggested answers：‎ ‎1．He saw a whale throwing itself out of the water and then crashing_down again.‎ ‎2．Because Clancy had already heard that George didn't like being_kept_waiting.‎ ‎3．They could see Old Tom swimming by the boat，showing them the way.‎ ‎4．Tom circled back to the boat，leading them to the hunt again.‎ ‎5．He could see a whale being_attacked by a pack of about six other killers.‎ Next，ask students to pay attention to the underlined words and lead into the grammar item—“v.－ing”/“being done”．‎ Step 2　Grammar learning ‎1．现在分词(－ing 形式)的构成。‎ v．－ing 形式由 “do＋ing” 构成，其否定形式是 “not doing”，v.－ing 可以带宾语或状语构成 v．－ing 短语，没有人称和数的变化，但有时态和语态的变化。‎ ‎2．动词－ing 形式的被动式分一般式和完成式：‎ ‎(1) 一般式：表示这个被动的动作正在进行或与谓语表示的动作同时发生。‎ ‎(2) 完成式：强调这个被动的动作在谓语动词所表示的动作之前完成。‎ ‎　　语态时态 主动语态 被动语态 一般式 ‎(not)doing ‎(not)being done 完成式 ‎(not)having done ‎(not)having been done ‎　　3.动词－ing的被动式的句法功能。‎ ‎(1)作主语。如：So_being_killed_by_sharks was a common thing.‎ ‎(2)作宾语，用在介词后或需要带－ing 形式作宾语的动词后。如：‎ George didn't like being_kept_waiting.‎ He was terrified of being_abandoned_by_us.‎ Do you remember_having_been_taken to Beijing at the age of ten?‎ ‎(3)作表语。如：‎ What worried the child most was his not_being_allowed_to visit his mother in the hospital.‎ ‎(4)作定语。如：‎ The problem being_discussed is of great importance.‎ ‎(5)作状语。如：‎ Having_been_shown_around the library，we were taken to see the lab.‎ ‎(6)作补足语。如：‎ As we drew closer，I could see a whale being_attacked by a pack of about six other killers.‎ When we approached him，I saw James being_held_up in the water by Old Tom.‎ ‎[注意]‎ ‎(1)v.－ing 形式的被动式主要在句子中作状语、宾语补足语和定语。但v.－ing 形式的被动式的完成式，一般在句中作状语(偶尔作非限定定语)，不作其他成分。‎ They don't like the_design_of_the_new_bridge_being_built.(正在建造的桥的设计)‎ Not_having_been_completed，the museum can't be visited yet.(由于没有完工……)‎ ‎(2)v.－ing 形式的被动式逻辑主语(即动作的承受者)如果也是主句的主语，就不需要表示出来，但是如果逻辑主语不是主句的主语，就得把v.－ing 形式自己的主语表示出来。如：‎ The whole classroom having_been_cleaned，the students went home happily.‎ ‎(3)在want，need，deserve，require，repay，bear，take等动词及形容词worth后，习惯用动词－ing的主动形式表示被动意义，相当于“to be done”。如：‎ The house wants_cleaning.‎ 这房屋需要打扫。 ‎ My watch needs_repairing.‎ 我的手表需要修理。‎ The way deserves_mentioning.‎ 这个方法值得一提。‎ These young trees will require_looking_after carefully.‎ 这些小树需要细心照顾。‎ The film is worth_seeing.‎ 这部影片值得一看。 ‎ Step 3　Exercises 句型转换(改成带－ing形式被动结构的简单句)‎ ‎(1)The hotel which is being built now beside the park was designed by a group of young men.‎ ‎(2)The little girl was eventually aware that her parents abandoned her in the mountainous village.‎ ‎(3)He would come even if we don't invite him.(without)‎ ‎(4)After he had been examined several times，he was told to be healthy.‎ ‎(5)I noticed that some people were taken to the police station.‎ Suggested answers：‎ ‎(1)The hotel being built now beside the park was designed by a group of young men.‎ ‎(2)The little girl was eventually aware of being abandoned by her parents in the mountainous village. ‎ ‎(3)He would come without even being invited.‎ ‎(4)After having been examined several times，he was told to be healthy.‎ ‎(5)I noticed some people being taken to the police station.‎ Step 4　Drilling Ask students to do Exercise 1 on Page 23 and check with their partners then check together.‎ Ask students to do Exercise 2 and check the answers together.‎ Keys：1.being attacked　2.Being held up　3.Being included　4.Having been accepted ‎ ‎5．being told　6.Being helped out　7.being taken　8.being photographed　9.being swallowed.‎ Step 5　Using structures Show students the 6 pictures on Page 64 and ask them to describe them using the passive －ing form in pairs.‎ Keys：1.being invited　2.being kept waiting　3.being attacked　4.being awarded　5.being shouted at　6.being blamed Step 6　Homework Finish off Exercise 2 on Page 64.‎