Unit 2 Be Good Friends(期中知识清单)四年级英语上学期(北京版·新教材)
知识清单·北京版四年级上册
Unit2 Be good friends
知识梳理
知识点拨
—What are you reading, Mike?
—I'm reading a science book.
解析:
(一)结构:现在进行时用来描述 “此时此刻正在做的动作”,结构是:be 动词(am/is/are) + 动词的 - ing 形式。
1. 问句中:“you(你)” 是第二人称,所以 be 动词用 are;“read(读)” 的 - ing 形式是 reading,所以问句是 What are you reading...?(你正在读什么?)。
2. 答句中:“I(我)” 是第一人称,所以 be 动词用 am;“read” 的 - ing 形式是 reading,所以答句是 I'm reading...(我正在读……)(“I'm” 是 “I am” 的缩写)。
(二)一般疑问句与特殊疑问句对比表
| 一般疑问句(Yes/No 回答) | 特殊疑问句(具体信息回答) |
核心功能 | 询问 “是否正在做某事”,用 “是 / 否” 回应 | 询问 “正在做什么、在哪里做、谁在做”,用具体内容回应 |
核心结构 | 1. 公式:Be 动词(am/is/are)+ 主语 + 动词 - ing + 其他? 2. 关键:把肯定句的 Be 动词提前
| 1. 公式:特殊疑问词 + Be 动词 + 主语 + doing + 其他? 2. 关键:特殊疑问词开头,加 “doing”(对动作提问时) |
Be 动词选择规则 | 按主语人称 / 数量选: - 主语 = I → am - 主语 = you / 复数 → are | 同左,Be 动词需匹配主语的人称 / 数量 |
| - 主语 = he/she/it/ 单数 → is |
|
常用疑问词 | 无(仅 Be 动词开头) | 1. What(问 “做什么”,最常用) 2. Where(问 “在哪里做”) 3. Who(问 “谁在做”) |
例句(原句→问句→回答) | 例 1: 原句:I am cleaning the room. (我在打扫房间) 问句:Are you cleaning the room? (你在打扫房间吗?) 回答:Yes, I am. / No, I isn’t. 例 2: 原句:He is reading a storybook. (他在读故事书) 问句:Is he reading a storybook? (他在读故事书吗?) 回答:Yes, he is. / No, he isn’t. | 例 1(What): 原句:She is drawing a cat.(她在画猫) 问句:What is she doing?(她在做什么?) 回答:She is drawing a cat. 例 2(Where): 原句:They are playing basketball in the park.(他们在公园打篮球) 问句:Where are they playing basketball?(他们在哪里打篮球?) 回答:In the park. 例 3(Who): 原句:Tom is watering flowers.(汤姆在浇花) 问句:Who is watering flowers?(谁在浇花?) 回答:Tom. |
核心易错点 | 1. 主语是 “I” 时,问句要变 “you”,Be 动词 “am” 变 “are”(别错说 “Am you...?”) 2. 动词 - ing 形式不变(别变回原形) | 1. 对动作提问必须加 “doing”(别错说 “What is she?”,要加 “What is she doing?”) 2. 回答不用 “是 / 否”,要给具体信息 |
(三)用法场景
当我们想知道别人现在正在做什么,或者要描述自己现在正在做的事,就用 “现在进行时”。比如:
What are you doing? (你正在做什么?)
I'm singing. (我正在唱歌。)
( )2.—Hello, ______ I speak to Lingling?
—Sorry, she’s not here.
A. may B. am C. do
( )3.When I can’t find my pen, my friend ______ me.
A. help B. helping C. helps
( )4.We often go to school ______ together every morning.
A. with B. / C. for
( )5.—Can you help me with my English?
—______
A. Yes, I can. B. No, I don’t. C. Yes, I am.
二、根据括号内提示或上下文,补全单词或用所给词的正确形式填空。
1. Lucy is my good ______ (朋友). We play together every day.
2.My brother often ______ (help) my mom clean the room.
3.Let’s read the story ______ (一起). It’s very interesting.
4.—May I ______ (call) you this evening?
—Sure!
5.He always ______ (share) his snacks with his deskmate.
三、从方框中选择合适的单词,补全句子(每词限用一次)。
(help share good together call)
1. My sister is a ______ friend. She always helps me.
2.We often do our homework ______ after school.
3.Can you ______ me carry this heavy bag?
4.I want to ______ my new book with you. It’s about animals.
5. Let’s ______ Lingling. She wants to play with us.
四、将 A 栏的问句与 B 栏的答句用线连起来。
A 栏 B 栏
D. Sure! Let’s read it together.
E. We often play games and share snacks.
考点二:
一、1.C 2.A 3.A 4.A 5.B
考点三:
一、1.B 2.C 3.B 4.A 5.B
考点四:
一、1.B 2.A 3.A 4.B 5.B