Unit 13 We're trying to save the earth Section A (Grammar Focus-4c)教案 2022-2023学年人教版九年级全册英语

Unit 13 We’re trying to save the earth！ Section A（Grammar Focus-4c） Teaching Aims · Language goals To review different tenses and voices. · Key words and phrases take part in ,afford, turn off, reusable, pay for, take action, transportation · Key sentences 1. Have you ever taken part in an environmental project? 2. We should help save the sharks. Teaching Difficulties Let Ss review different tenses and voices. Teaching Aids CAI, multimedia courseware or other realia that the T needs for teaching Teaching Procedures Tips Step 1 Warm up · Revision Ask Ss to work in pairs, then take turns to retell the passage of 3a. (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: What's 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 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 &Grammar Grammar Focus · Ask Ss to read the sentences in the columns of Grammar Focus. Tell Ss that they’re going to review the present progressive, 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-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