【人教版必修五unit5Grammar.ppt】讲解的核心知识点是英语语法中的"省略"（Ellipsis），这是为了语言简洁和避免重复而常见的一种现象。在英语中，省略可以发生在句子的不同成分上，如主语、谓语、宾语、定语或状语。下面将详细阐述这一知识点，并通过例子进行说明。
1. **省略主语**：在某些情况下，当主语是代词"I"或"you"，且上下文清楚时，可以省略。例如："Am I late?"（我迟到了吗？）可以简化为"Late?"。
2. **省略谓语**：当动词是be动词且主语是代词时，可以省略。如："It's ready."（它准备好了。）可以简写为"Ready."
3. **省略宾语**：当宾语是代词时，也可以省略。例如："Give it to me."（给我。）在口语中常简为"Give me."
4. **省略定语或状语**：在一些固定搭配或口语表达中，定语或状语也可能被省略。例如："The rest he saved."（他剩下的都存起来了。）
接下来，我们通过练习来进一步理解这些省略形式：
1. "Like more beer?" 可以理解为"Do you like more beer?"
2. "Haven’t seen you for ages." 意思是"I haven’t seen you for ages."
3. "Sounds like a good idea." 实际上是"It sounds like a good idea."
4. "Sorry I couldn't go." 相当于"I'm sorry I couldn't go."
5. "Doesn’t matter." 等同于"It doesn’t matter."
6. "If he says he'll come, he will." 可以简化为"If he says he'll come, he will come."
7. "Going to the supermarket?" 翻译为"Are you going to the supermarket?"
8. "Pity you couldn’t come." 实际上是"It's a pity you couldn’t come."
9. "Sounds good." 与"It sounds good."含义相同。
10. "Everybody appears well prepared." 可以省略为"Everybody appears prepared."
此外，本节还提到了"Discovering useful structures"，强调在保持句子意思不变的情况下，去除不必要的部分。以下是几个例子：
1. 原句：The burn that she got from the iron was red and it was very painful.
简化：She got a red and painful burn from the iron.
2. 原句：A boy was on the left side of the sick woman, and a girl was on the right side of the sick woman.
简化：A boy and a girl were on either side of the sick woman.
3. 原句：She has a daughter who is in hospital.
简化：She has a daughter in hospital.
4. 原句：He went to the doctor because he had to go to the doctor.
简化：He went to the doctor.
5. 原句：Did she pass the first aid test that she did yesterday or didn’t she pass?
简化：Did she pass the first aid test yesterday?
6. 原句：She could not decide whether to send him to hospital or not to send him to hospital.
简化：She couldn't decide whether to send him to hospital.
7. 原句：When your nose is bleeding, you should bend forward so that the blood runs out of your nose and the blood doesn't run down your throat.
简化：When your nose bleeds, bend forward to prevent blood running down your throat.
8. 原句：Only some of the...
（这个句子不完整，无法简化。）
通过这样的练习，学生能够更好地掌握如何在保持原意的前提下，通过省略非关键信息来使得表达更加简洁、流畅，这也是英语写作和口语中的一大技巧。在教学过程中，教师应引导学生多加练习，以提高他们的语言运用能力。
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