(课件网) 初中英语译林版八上 Hands Hands fun fun -on -on Unit 4 Grammar 1 能精准识别、归纳祈使句（肯定、否定、礼貌表达 ）及 should/had better (not) 结构的语法规则。 2 能在 DIY 及类似生活场景中，正确运用祈使句发指令、用 should/had better (not) 提建议。 3 借 DIY 语境感受语法实用性，增强“用语法解决实际交流问题”的意识。 Learning objectives 重点 重点 Millie and Andy are trying to put together a bookshelf. Read their conversation and pay attention to the parts in bold. Andy: Let's put the pieces of wood together. Please hand the tools to me. Millie: OK. Here you are. What else can I do Andy: Look for the chalk mark on the top of each piece. Make sure pieces of the same size are in the same group. Don’t mix them up. Read and observe What type of sentences are they They are positive imperative sentences (肯定祈使句). Positive imperative sentences usually start with a verb in its base form (动词原形). Andy: Let's put the pieces of wood together. Please hand the tools to me. Millie: OK. Here you are. What else can I do Andy: Look for the chalk mark on the top of each piece. Make sure pieces of the same size are in the same group. Don’t mix them up. Observe and answer Andy: Let's put the pieces of wood together. Please hand the tools to me. Millie: OK. Here you are. What else can I do Andy: Look for the chalk mark on the top of each piece. Make sure pieces of the same size are in the same group. Don’t mix them up. Observe and answer What about this sentence It’s a negative imperative sentence (否定祈使句). Negative imperative sentences start with “Don’t” + a verb in its base form. Andy: Let's put the pieces of wood together. Please hand the tools to me. Millie: OK. Here you are. What else can I do Andy: Look for the chalk mark on the top of each piece. Make sure pieces of the same size are in the same group. Don’t mix them up. Observe and answer How can we make an imperative sentence sound more polite Can you find an example in the dialogue We can add “please”. Summarize Work out the rule! We start a sentence with the base form of a verb when we want to tell people what to do. We add _____ before a verb when we want to tell people not to do something. We often add _____ in a sentence to make an instruction more polite. We can use _____ when we want to suggest doing something together. don’t please let’s 祈使句是用来表示请求、命令、建议、警告等的句子，通常省略主语 “you”。 以动词原形开头。 肯定祈使句直接以动词原形开头，如：Open the door.（开门。） 否定祈使句是在动词原形前加 “Don't”，如：Don't be late.（不要迟到。） Let’s learn Structure Definition 为了使祈使句听起来更礼貌，我们可以在句首或句末加上 “please”。 “please” 放在句首时，后面的动词无需用逗号隔开；放在句末时，要用逗号与前面的句子隔开 。如：Please sit down. = Sit down, please.（请坐。） 祈使句的语气和礼貌表达 Let’s learn 祈使句的反意疑问句通常用 “will you”（Let's 开头的祈使句，反意疑问句用 “shall we”） E.g. Open the windo ... ...
