Unit 8 Section A 知识点讲解+练习 2024-2025学年人教版英语八年级下册

Unit 8 Have you read Treasure Island yet?

Section A

【知识点讲解一】

1. Have you read Treasure Island yet? (P57)

【解析1】现在完成时

1) 基本句型：   

肯定式：主语 + 助动词have/has + 动词的过去分词.  

疑问式：助动词Have/Has + 主语 + 动词的过去分词? 

否定式:  主语 + 助动词have/has + not + 动词的过去分词.

2) 主要用法：

①表示过去发生的某一动作对现在造成的影响或结果。常和副词already, yet, never, ever, before, just等连用。

e.g.: I have posted the photos.

(邮寄的动作发生在过去，并且已经完成，带来的结果就是这些照片已经不在“我”这里了。)

②表示过去已经开始, 持续到现在的动作或状态。常与since + 过去的时间点，for + 一段时间，so far 等时间状语连用。   

e.g.: They have lived there since 1998.

(居住的动作从1998年开始，一直持续到现在，且仍有可能持续下去。)

3) already/ yet的区别：

①already 往往用于肯定句，用在疑问句时表示强调或加强语气；

②yet 用于否定句和疑问句。

e.g.: “He’s already left,” she informed us. 

Have you finished already? That was quick!  (我以为你没有做完，表示出乎意料。)

I haven't answered her email yet.

Have you opened your post yet?

4) 动词的过去分词的构成：

①规则变化形式

动词	变化规则	例词
一般动词	直接+ ed	look --looked wash-- washed

		clean--cleaned
不发音的e结尾	去e+ed	live-- lived move--moved waste--wasted
重读闭音节末尾只有一个辅音字母(辅-元-辅)	双写尾字母 + ed	stop --stopped regret--regretted
辅音字母 + y 结尾	变 y为 i + ed	study → studied

 

②不规则变化形式

不规则动词
A-A-A	put-put-put                             hit-hit-hit
A-B-B	lose-lost-lost                           build-built-built
A-B-A	come-came-come                       run-ran-run
A-B-C	eat-ate-eaten                           fall-fell-fallen

注意：不规则动词的过去分词需要不断积累并加以识记。

 

【解析2】treasure作可数名词时，意为“物品；珍宝；珍品”；作不可数名词时，意为“金银财宝；珠宝；财富”。

 

2. What’s it like ? (P57)

【解析】某物怎么样?  What’s +物+like ? =How+be + 物 ?

        某人怎么样?  What’s +人+like ? 用来提问人的性格

                     What do / does +人 + look like ? 用来提问人的外表。

e.g.: What’s the weather like in Moscow today?

What does your daddy look like?

 

3. Oliver Twist is about a boy who went out to sea and found an Island full of treasures. (P58)

【解析1】go out to sea 出海

e.g.: Fishermen go out to sea for fish every day.    

 

【解析2】full of是形容词短语，意为“满是...的，（有）大量的，（有）丰富的”，在句中作后置定语。此外，full of也可以在句中充当状语或表语。be full of = be filled with充满

e.g.: He received several baskets full of cards and letters.（后置定语）

Robinson stared at the footprint, full of fear.（状语）

As we returned home,everything seemed to be full of life.（表语）

Our life is full of chances, but there are also a lot of challenges.

 

4.Steve, have you decided yet which book to write about for English class? (P58)

【解析】“which book to write” 是“疑问词+不定式”结构，在句中作动词decide的宾语。不定式有时可以与what, which, who, how, when, where等疑问词连用，构成不定式短语。 即：“疑问词+不定式”相当于一个名词性从句，常在动词后面作宾语。

e.g.: I don’t know how I can learn English well. 

= I don’t know how to learn English well.  

 

5. I’ve already finished reading it!  (P58)

【解析】finish doing sth 做完某事。finish 后跟动名词作宾语,类似用法的动词有enjoy, practice, mind, can’t stand, can’t help等。

e.g.: I enjoy climbing the mountains when I’m free.[

 

6. It’s about four sisters growing up.  (P58)

【解析】grow up 长大：指在身体或心智上达到完全成熟的状态。   

e.g.: These days kids grow up so quickly.

【拓展】grow into 长大成为    

e.g.: It is everyone’s responsibility to make sure that young people grow into healthy adults.

 

7. It was really good, so I couldn’t put it down. (P58)

【解析】put down 放下  （v+adv)

【注】“动词+ 副词” 构成的短语，①后跟名词时，可以放在两者之间或之后；

                               ②后跟代词时，只能放在两者之间。

e.g.: He put down the book and went out.