1、Unit 13 Were trying to save the earth！Section A（Grammar Focus-4c）Teaching Aims Language goals To review different tenses and voices. Key words and phrasestake part in ,afford, turn off, reusable, pay for, take action, transportation Key sentences1. Have you ever taken part in an environmental projec
2、t?2. We should help save the sharks.Teaching DifficultiesLet Ss review different tenses and voices. Teaching AidsCAI, multimedia courseware or other realia that the T needs for teaching Teaching ProceduresTipsStep 1 Warm up RevisionAsk Ss to work in pairs, then take turns to retell the passage of 3a
3、. (Optional choice: T can also ask Ss to retell the passage by writing it down.) T can use the following questions to help Ss remember the passage:Whats the sharks problem?Why are they endangered?Some facts and numbers about sharks at present.How to save the sharks?(Tip: If the class is weak, T can
4、use the diagram on PPT P6 to help Ss review the passage. If the class is strong, T can use the diagram to make a summary after Ss retelling.) Step 2 Presentation &GrammarGrammar Focus Ask Ss to read the sentences in the columns of Grammar Focus. Tell Ss that theyre going to review the present progre
5、ssive, used to, passive voice, present perfect and modal verbs in this lesson.Grammar现在进行时现在进行时的基本结构：be (am/is/are) + 动词-ing现在进行时的基本用法： 1.表示现在正在进行或发生的动作。2. 表示现阶段或当前一段时间之内正在进行的动作。现在进行时的标志词：now、look、listen、these days等。动词-ing形式的构成a. 一般情况下，在动词词尾后加-ing。b. 以不发音的e结尾的动词，去掉e加-ing。c. 以重读闭音节结尾的动词，末尾只有一个辅音字母，双写
6、这个辅音字母，再加-ing。现在完成时现在完成时的基本结构：have/has + 过去分词现在完成时的基本用法：1. 表示过去发生或已经完成的动作对现在造成的影响或结果。2. 从过去某一时间开始并一直持续到现在且还有可能持续下去的动作。现在完成时的标志词：already、yet、ever、never、for +时间段、since +时间点、so far、in the last/past.years等。过去分词的构成1. 一般情况下，在动词后加-ed。如: work worked。2. 在以e结尾的动词后只加-d。如: close closed。3. 以辅音字母加y结尾的动词，应将y改为i再加-
7、ed。如: study studied。4. 以重读闭音节结尾的动词，要双写末尾的辅音字母再加-ed。 如: stop stopped。不规则动词的过去分词:AAA型 put put putAAB型 beat beat beatenABA型 become became becomeABB型 get got got/gottenABC型 begin began begun被动语态主动语态表示主语是动作的执行者。被动语态表示主语是动作的承受者，即行为动作的对象。在含有使役动词 (如：make) 或感官动词 (see、watch、notice、hear等) 的主动语态的句子中，这些词后常跟省略to的
8、动词不定式，但是改为被动语态时则要把省去的to还原。被动语态的构成被动语态的基本结构：助动词be + 及物动词的过去分词一般现在时的被动语态：am/is/are + 过去分词一般过去时的被动语态：was/were + 过去分词一般将来时的被动语态：will be/is going to be + 过去分词含情态动词的被动语态：情态动词 + be + 过去分词情态动词1. 情态动词一般没有人称和数的变化。2. 情态动词后接动词原形。3. 常用的情态动词有：can/could、may/might、must/have to、should/ought to、would、need等。used to的用法
9、used to意为“过去常常做某事”，后接动词原形。used to句型的否定句形式：didnt use to.used to句型的一般疑问句形式：Did + 主语 + use to.?used to do表示过去常常做某事，而现在往往不做了；be used to doing表示习惯于做某事。Step 3 Practice4a Ask Ss to fill in the blanks with the correct forms of the verbs in brackets.Answers: (from left to right, from top to bottom)Have . tak
10、en, helped, considered, had . had, took, think, came, trying, wait4b Ask Ss to fill in the blanks with the appropriate modal verbs from the box.Suggested answers:may / might, must / have to, can / should / could, can / could / should, have to, can / could / should, can / could,can / could, would / c
11、an / could4c T may want to have Ss work in groups of four to make a list of things that people can do to help protect the environment. When the groups have made their lists, conduct an open class discussion and elicit suggestions from each group. T can write the suggestions on the board, then encour
12、age Ss to comment on one anothers suggestions.Suggested answers:take your own shopping bags when you go shoppingdont use disposable items like disposable cutlery, cameras, etc.turn off the lights when you leave the roomreduce the use of air conditioners in summergrow more plantsStep 4 Language point
13、s learningtake part in的意思是“参加”，它多指参加会议或集体性的工作或活动，且参加者在其中发挥一定的作用。afford作动词，意思是“承担得起（后果）；买得起”常用在can、could、be able to等之后。afford sth.“买得起某物”；afford to do sth.“负担得起做某事”。Step 5 Exercise,Summary&HomeworkExercise Do the exercises from PPT P25-P27.Homework Preview the new words and phrases in Section B(1a-1e
14、). Do the exercises in students book.Teaching ReflectionIn this period, we should review the present progressive tense, present perfect tense, passive voice, modal verbs and the structure “used to” in reading and speaking activities. We will learn some new words and expressions about environmental p
15、rotection in language learning, so it is necessary to get the students to pay enough attention to the new words and try to collect more of them.When we deal with the grammar, we should know how the students learn them and get them to practice in different kinds of exercises. Students should practice grammar in different activities. And wed better give them some written work after speaking and reading.
