Unit 13 Section A Grammar Focus-4c 课件 2023-2024学年人教版英语九年级全册

Unit 13 We are trying to save the earth. Section A GF-4c How many tenses(时态) have we learned? What are they? Warming Up 一般现在时、一般过去时、一般将来时 现在进行时、过去进行时 现在完成时、过去完成时 时 态 How many voices(语态) and tenses(时态) have we learned? What are they? 现 在 过 去 将 来 一 般 进 行 完 成 完 成 进 行 √ √ 过去将来 √ √ √ √ √ √ √ 主动语态、被动语态 Presentation Grammar Focus We’re trying to save the earth. Present progressive The river used to be so clean. used to The air is badly polluted. Passive voice No scientific studies have shown that shark fins are good for health. Present perfect We should help save the sharks. Modal verbs 4 The river used to be clean. Presentation However, it is badly polluted. People are throwing rubbish to the river. Factories are putting waste into the river. The government has taken actions. Some laws are developed to stop the pollution. Everyone should take part in saving the earth. used to do sth 被动语态 现在进行时 现在完成时 情态动词 Work in groups and talk about one point . 现在进行时： 时态： Let’s review! 什么时候使用现在进行时？ 现在进行时的标志性词语有哪些？ 现在分词的构成规则有哪些？ 现在进行时: Present progressive 结构: be (am/is/are) + v.-ing 标志词：Look, Listen, now, right now… e.g. Look! The boy is crying. 定义:表示说话时(瞬间)正在进行的动作, 也表示目前 或现阶段正在进行的动作。或说话者的强烈情感。 现在进行时 基本 结构 基本 用法 标志词 be (am/is/are) + 动词-ing 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。 now、look、listen、these days等 现在进行时 v.-ing形式(现在分词)的构成： a. 一般情况下在动词词尾加-ing。 b. 以不发音的e结尾的动词，去掉e加-ing。 c. 以一个辅音字母结尾的重读闭音节，双写最后一个字母，再加-ing。 Grammar Focus 用括号内所给动词的适当形式填空。 Listen! The phone __________(ring). Please go to answer it. 2. — Alan, it’s late. Why not go to bed? — Jenny hasn’t come back yet. I ___________(wait) for her. 3. — What’s your father doing now? — He __________ (write) a letter in the study. is ringing am waiting is writing Group discussion What a fine day today! Look! What are they doing? 11 used to do sth. 表示过去常常做某事, 而现在往往不 了, 后接动词原形。 be used to doing sth. 表示习惯于做某事 e.g. I used to get up at six o’