北師大版英語(yǔ)九年unit8keepingsafeword重難點(diǎn)詳解(已修改)
2025-11-29 19:05 本頁(yè)面
【正文】 Unit 8 Keeping Safe 一 . 教學(xué)內(nèi)容： Unit 8 Keeping Safe 二、教學(xué)重點(diǎn)： must， mustn’t 和 have to 的使用 重點(diǎn)詞組 三、具體內(nèi)容： （一）語(yǔ)法要點(diǎn)： have to和 must的區(qū)別 have to 的用法 have to 常表示因客觀需要（由于外界因素的限制被迫）必須做某事，有 “必須，不得不 ”的意思 1. have to 有時(shí)態(tài)，人稱和數(shù)的變化 Mary had to go to school with her teacher yesterday. 2. have to 的否定形式是 don’t have to，譯為 “不必 ”. You don’t have to go shopping now. must的用法 情態(tài)動(dòng)詞 must是表示人的主觀看法 . 有 “必須，應(yīng)當(dāng) ”的意思 . 1. must 沒(méi)有時(shí)態(tài)，人稱和數(shù)的變化 . 2. must 的否定形式是 must not，表示 “不可，不許 ”的意思 . You mustn’t waste your time. 3. must 還可表示說(shuō)話人對(duì)事物的肯定推斷，含有 “一定，準(zhǔn)是 ”的意思 . Mr. Yin must be over forty now. Ex. Complete the rules with the correct forms of the verbs from the box。 Lee Junior High School Safety Rules All students in this junior high school must follow the safety rules: ride keep bring know leave use report talk allow ● All students must walk on the righthand side of the hall. ● Students should not sit on the stairs or block the hallways. ● Every class must have at least one first aid kit. Students are not _________ to play with the things inside it. ● Students should not bring fireworks, cigarettes, wine, or drugs to school. ●
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