英语Unit 2 Wildlife protection教案

这是一份英语Unit 2 Wildlife protection教案，共7页。教案主要包含了学习目标，重点难点，学情分析，导学流程等内容，欢迎下载使用。

Perid3 Discvering Useful Structure
【学习目标】
1. 学生能够熟练掌握8种常见时态被动语态的结构、用法及注意事项。
2. 能够熟练并灵活运用被动语态正确做题。
【重点难点】
1.重点：熟练掌握8种常见时态被动语态的结构、用法及注意事项。
2.难点：能够熟练并灵活运用被动语态正确做题。
【学情分析】学生能够说出各个时态被动语态的结构，但是做题的时候容易丢掉be动
词和过去分词，还有一些注意事项和易错点也是学生容易出错的地方。
【导学流程】
一、回顾旧知
被动语态的含义、结构。
二、自主学习
△8种常用时态的被动语态：
1. 结构：由“助动词be + 及物动词的过去分词”构成。助动词be 有时态、人称和数的变化。
(1) 一般现在时：am/is/are +过去分词。
如： Rice is grwn in suth China. 华南种植水稻。
(2) 一般过去时：was/were+过去分词。
如： The glass was brken yesterday. 这块玻璃是昨天打烂的。
(3) 现在进行时：am/is/are being +过去分词。
如： The prject is being carried ut. 这个计划正在执行中。
(4) 过去进行时：was/were/being +过去分词。
如： This rad was being built this time last year. 这条路去年这个时候还在修建。
(5) 一般将来时：will be +过去分词。
如： The cars will be sent abrad by sea. 这些汽车将由水路运往国外。
(6) 过去将来时：wuld be +过去分词。
如： The manager said the prject wuld be cmpleted by the end f the year. 经理说这个工程在年底前将会完成。
(7) 现在完成时：have/has been +过去分词。
如： This nvel has been translated int several languages.这本小说已被译成了几种
语言。
(8) 过去完在时：had been +过去分词。
如： When I gt t the theatre, I fund the tickets had already been sld ut. 我到达剧院时，发现票已卖完了。
2. 被动语态的主要用法：
■当不知道或没有必要指出动作的执行者时，常用被动语态，这时往往不用by短语。 、如：The frnt windw in the classrm was brken yesterday. 昨天，教室的前窗被打破了。(不知谁打破的)
They have been prly paid. 他们的工资太低。(没必要指出工资是谁付的)
突出或强调动作的承受者，如果需要说出动作的执行者，用by短语。
如：The time-table has been changed. 时间表已变动了。(要突出的是“时间”)
为了使语言得体或圆滑等不愿意说出动作的执行者。
如： Yu are requested t make a speech at next meeting. 请您在下次会议上作个发言。
出于修辞的原因，或是说为了更好地安排句子。
如： It is generally cnsidered implite t ask ne’s age, salary, marriage, etc. . 问别人的年龄、工资、婚姻状况等通常被认为是不礼貌的。
3. 主动语态变被动语态的方法：
将主动语态的宾语变为被动语态的主语，将主动谓语变为被动谓语(be+过去分词)，将主动语态的主语变为by短语(在被动句中用作状语)：
He stle ur mney.→Our mney was stlen by him.
【注】(1)若不强调动词执行者，被动语态中的by短语通常可以省略： The huse was built in 1978. 这座房子是1978年建的。
(2) 在转变语态时，要注意保持两种语态时态的一致性：
The students will study the prblem.
→The prblem will be studied by the students.
Our friends are repairing the rf.
→The rf is being repaired by ur friends.
4. 双宾动词的被动语态
双宾动词即指带双宾语的动词，它们在变为被动语态时，有以下两种情形值得注意：
(1) 有些双宾动词(如buy, give, leave, lend, ffer, pay, shw, teach, tell等)在变为被动语态时，既可把间接宾语(指人)变为被动语态的主语，而把直接宾语(指事物)保留下来(称为保留宾语)，也可把直接宾语(指事物)变为被动语态的主语，而把间接宾语改为介词t 或fr引起的状语(到底用t还是fr，与所搭配的动词有关)。比较：
He gave her sme mney. 他给她一些钱。
→ She was given sme mney. / Sme mney was given t him.
He bught her a watch. 他给她买了一快表。
→ A watch was bught fr her. / She was bught a watch.
(2) 有些双宾动词(如bring, d, make, pass, sell, send, sing, write等)通常用直接宾语(指事物)作被动语态的主语，而将间接宾语用作保留宾语(其前根据情况用介词t或fr)：
Father made me a dll. → A dll was made fr me.
He wrte her a letter. → A letter was written t her.
(3) 有些双宾动词(如answer, deny, envy, refuse, save, spare等)通常用间接宾语(指人)作被动语态的主语，而将直接宾语用作保留宾语：
He answered me that questin. → I was answered that questin by him.
5. 含有情态动词的被动形式
若主动语态中谓语含有情态动词，在相应的被动语态中通常应保留该情态动词，其结构为“情态动词+be(或be的适当时态形式)+过去分词”：
Everyne must knw this. →This must be knwn by everyne.
请看以下带情态动词被动句实例：
This can’t be dne in a shrt time. 这不是短期内可以完成的。
She may have been sent t wrk elsewhere. 她可能被派到别处工作去了。
The dr must have been lcked by my wife. 门一定是我妻子锁的。
The envirnment shuld be imprved. 环境应当改善。
The secnd pint needn’t be discussed tday. 第二点今天不必讨论。
6.下列动词（词组）没有被动式：
(1) happen, take place, break ut, belng t
(2) 不及物动词sell, wash, read , write,等，常用主动形式表示被动意义。
= 1 \* GB3 ① An accident was happened yesterday.（×）昨天发生了一起事故。
An accident happened yesterday.
= 2 \* GB3 ② The flwer smells sweet.这花闻起来很香。 ○
The watch lks gd.这表看起来很好。 ○
This bk sells well.这本书畅销。 ○
The kind f clth washes well. 这种布很容易洗。 ○
The article reads well. 这篇文章读起来很好。
三、小组讨论
1. Gd bks ____ again and again.
A. shuld be readed B. shuld be read C. must read D. ught t read
2. The children ____ by the nurse.
A. were lked B. lked after C. were lked after D. lked
3. He ___ sme pieces f advice, but he ____ t them.
A. gave, didn't listen B. was given, wasn't listened
C. give, wasn't listened D. was given, didn't listen
4. When____ the accident _____ ?
A. was, happen B. did, happen C. is, happen D. was, happened
5. The questin ____ by us sn.
A. is ging t discuss B. will discuss C. is ging t be discussed D. has been discussed
6. The lab ____ abut five years ag.
A. was builded B. was built C. builds D. has been built
7. A lt f tall buildings _____ in his hmetwn in the last three years.
A. have set up B. have been set up C. were set up D. set up
8. They ____ printing 500 cpies by the end f last mnth.
A. had finished B. have finished C. had been finished D. have been finished
9. Rice ___ als _____ in their hmetwn.
A. is…grwn B. is…grew C. was…grew D. was…grwn
10. He ____ by the teachers.
A. is always praised B. praises C. have been praised D. always is praised
11. Great changes ____ place. Many new schls____ .
A. have taken, have been pened B. take, are pen
C. are taken, pen D. have been taken, are pened
12. The picture______ in Octber, 1996.
A. was taking B. had been taken C. was taken D. had taken
四、随堂练习
五、整理内化
1课堂小结
2 本节课学习过程中的问题和疑难