Unit 3 Colours and Letters单元知识总结及重点易错（专项训练）-2026-2027学年冀教版（三起）英语三年级上册

冀教版（三起）三年级上册 Unit 3 Colours and Letters 专项训练 冀教版（三起）三年级上册 Unit 3 Colours and Letters 单元知识总结及重点易错专项训练 ■ ■ ■ ■ ■ ■ ■ 说明：本练习紧扣最新教材精选 10 个重点易错考点，每个考点含基础题×3、提升题×3、拓展题×3，共 90 题。 一、重点单词（Word Bank） 单词/短语 中文释义 词性 例句 colour 颜色 n. What colour is it? red 红色；红色的 n./adj. It's red. yellow 黄色；黄色的 n./adj. This is yellow. blue 蓝色；蓝色的 n./adj. It's blue. orange 橙色；橙色的 n./adj. The orange is orange. green 绿色；绿色的 n./adj. It's green. purple 紫色；紫色的 n./adj. Wow! It's purple. it 它 pron. It's red. this 这个 pron. This is red. now 现在 adv. What colour is this now? letter 字母 n. What letter is this? card 卡片 n. This is my letter card. book 书 n. This is my letter book. hold on 等一下 phr. Hold on, please. everywhere 到处；处处 adv. Letters are everywhere. order 顺序 n. Now they are in order. no 不；不是 adv. No. It's orange. yes 是的 adv. Yes, it is. and 和；加 conj. Red and yellow. wow 哇（感叹词） interj. Wow! It's purple! 二、重点短语（Key Phrases） 短语 中文释义 What colour is this? 这是什么颜色？ What colour is it? 它是什么颜色？ It's red/yellow/blue. 它是红色/黄色/蓝色。 This is red. 这是红色。 Is it blue? 它是蓝色的吗？ Yes, it is. / No, it isn't. 是的，它是。/不，它不是。 Red and yellow. 红色和黄色。 What colour is this now? 现在这是什么颜色？ That's cool! 那太酷了！ in order 按顺序；整齐 hold on 等一下 letter card 字母卡片 letter book 字母书 make a letter 做一个字母 play a game 玩游戏 all around 处处；周围 point to... 指着…… look, listen and say 看一看，听一听，说一说 listen and chant 听一听，吟唱 colour and guess 涂色并猜一猜 三、重点句型（Key Sentences） 1. — What colour is this? — It's red. 询问某物颜色用 What colour is this/it? 回答用 It's + 颜色. 2. This is red. This is yellow. 用 This is + 颜色. 介绍眼前的颜色。this 指近处。 3. — Is it blue? — No. It's orange. 用 Is it + 颜色? 确认颜色。肯定 Yes, it is. 否定 No, it isn't. 4. Red and yellow = orange. Red + blue = purple. Yellow + blue = green. 两种颜色混合产生新颜色。常考搭配。 5. Wow! It's purple. That's cool! 用 Wow! / That's cool! 表达对颜色的惊喜和赞叹。 6. — What letter is this? — It's the letter A. 询问字母用 What letter is this? 回答 It's the letter + 大写字母. 7. — What letters can you see? — I see A, T and M. 询问看到的字母用复数 letters，回答 I see + 字母(s). 8. Letters are everywhere. everywhere = every + where，表示字母在生活中到处可见。 9. Now the letter cards are in order. in order 表示按顺序、整齐排列。反义词 out of order. 10. A, E, I, O, U. Now I know my a, e, i, o, u. 英语五个元音字母 A E I O U，常通过歌曲记忆。 四、重点语法（Grammar Focus） 1. What colour is this/it? — It's + 颜色. 本单元最核心句型。what colour 意为"什么颜色"，回答固定用 It's + 颜色词。颜色词既可作名词也可作形容词。 2. Is it + 颜色? — Yes, it is. / No, it isn't. 一般疑问句，确认某物是否为某种颜色。注意缩写：it is = it's，is not = isn't。否定回答中 it is 不能缩写。 3. This is + 颜色. 介绍距离说话人较近的颜色。this（这个）与 that（那个）相对。注意 This is 不能缩写为 This's. 4. 颜色混合公式：A and B = C red + yellow = orange, red + blue = purple, yellow + blue = green。这是本单元特色内容，常考。 5. What letter is this? — It's the letter A. 注意回答格式：It's the letter + 大写字母。字母名用英语念，如 A 读作 /eI/. 6. 元音字母：A, E, I, O, U 英语有5个元音字母，其余21个为辅音字母。常考：选出不同类的字母（元音 vs 辅音）。 7. a / an 的选择规则 a 用于辅音音素开头的词前（a red pen），an 用于元音音素开头的词前（an orange）。判断依据是发音而非字母。 ● ● ● ● ● ● ● 十大重点易错考点专项训练 （全部为选择题，每题4个选项，A/B/C/D 四色区分） ● ● ● ● ● ● ● 考点一：What colour is this/it? 询问颜色及回答 ◇ 基础题：（选择题） ◇（ ）1. Look at the apple. __________ is it? A. What B. What colour C. How D. Where ◇（ ）2. — __________ is the pen? — It's blue. A. What B. What colour C. How many D. Who ◇（ ）3. — What colour is the banana? — __________. A. It's yellow B. It yellow C. Yellow it is D. Is yellow ▷ 提升题：（选择题） ▷（ ）1. — What colour is the orange? — __________. A. It's orange B. Yes, it is C. It's an orange D. No, it isn't ▷（ ）2. The sky is blue. "__________" asks about its colour. A. What B. What colour C. How D. Where ▷（ ）3. — What colour __________ this now? — It's purple. A. are B. am C. is D. be ★ 拓展题：（选择题） ★（ ）1. Which question matches "这个橙子是什么颜色？"? A. What is the orange? B. What colour is the orange? C. How is the orange? D. Where is the orange? ★（ ）2. — What colour is the letter O? — __________. A. It's orange B. Yes, it is C. It's the letter O D. No, it isn't ★（ ）3. — __________ — It's green. A. Is it green? B. What colour is it? C. This is green. D. It's green. 考点二：Is it + 颜色? 一般疑问句及回答 ◇ 基础题：（选择题） ◇（ ）1. — Is it blue? — __________ it isn't. It's green. A. Yes B. No C. Not D. No. ◇（ ）2. — Is it red? — Yes, __________ is. A. it B. this C. that D. they ◇（ ）3. — Is it orange? — __________ it is. A. Yes B. No C. Not D. Isn't ▷ 提升题：（选择题） ▷（ ）1. — Is it purple? — No, __________. A. it is B. is it C. it isn't D. not is ▷（ ）2. — Is the letter R red? — Yes, __________. A. it isn't B. it is C. this is D. that is ▷（ ）3. — Is it blue? — No. It's __________. A. blue B. green C. a green D. green colour ★ 拓展题：（选择题） ★（ ）1. Which is a correct negative answer? A. Yes, it is. B. No, it isn't. C. It's blue. D. Is it blue? ★（ ）2. — Is it yellow? — __________. It's orange. A. Yes, it is B. No, it is C. No, it isn't D. Yes, it isn't ★（ ）3. — Is it red? — Yes, it is. It's a __________ ruler. A. blue B. red C. green D. yellow 考点三：This is + 颜色. 介绍颜色 ◇ 基础题：（选择题） ◇（ ）1. __________ is red. __________ is yellow. A. This, This B. It, It C. That, That D. This, It ◇（ ）2. This is __________. It's blue. A. red B. blue C. green D. yellow ◇（ ）3. — What is this? — __________ is green. A. This B. It C. That D. They ▷ 提升题：（选择题） ▷（ ）1. Look, Danny. __________ is red. __________ is blue. A. This, This B. It, It C. That, This D. This, That ▷（ ）2. — Is this green? — No. __________ is red. A. This B. It C. That D. They ▷（ ）3. __________ is my letter book. It's very nice. A. This B. It C. That D. They ★ 拓展题：（选择题） ★（ ）1. Which sentence introduces a colour near the speaker? A. That is red. B. This is red. C. It is red. D. Is this red? ★（ ）2. — What colour is this? — __________ is orange. A. This B. It C. That D. They ★（ ）3. — Is this your letter card? — Yes. __________ is blue. A. This B. It C. That D. They 考点四：颜色混合 Red+yellow=orange 等 ◇ 基础题：（选择题） ◇（ ）1. Red and yellow is __________. A. green B. purple C. orange D. blue ◇（ ）2. Red and blue is __________. A. orange B. green C. purple D. yellow ◇（ ）3. Yellow and blue is __________. A. orange B. purple C. red D. green ▷ 提升题：（选择题） ▷（ ）1. — What colour is red and yellow? — It's __________. A. purple B. green C. orange D. blue ▷（ ）2. Look, red and blue. Wow! It's __________. A. orange B. green C. yellow D. purple ▷（ ）3. Yellow and blue. What colour is this now? It's __________. A. orange B. purple C. red D. green ★ 拓展题：（选择题） ★（ ）1. If you mix red, yellow and blue, what colour do you get? A. orange B. purple C. green D. brown ★（ ）2. — What colour is this now? — Red and yellow. It's __________. A. purple B. green C. orange D. blue ★（ ）3. That's cool! Red and blue make __________. A. orange B. green C. yellow D. purple 考点五：字母认知 What letter is this? ◇ 基础题：（选择题） ◇（ ）1. — What letter is this? — It's the letter __________. A. A B. a C. an A D. A letter ◇（ ）2. — What letter is this? — __________ the letter B. A. This is B. It's C. That is D. They are ◇（ ）3. O o orange orange. The letter O is for __________. A. apple B. orange C. blue D. red ▷ 提升题：（选择题） ▷（ ）1. — What letter is this? — It's the letter __________.（字母C） A. C B. c C. a C D. C letter ▷（ ）2. P p purple pencil. The letter P is for __________ pencil. A. red B. blue C. purple D. green ▷（ ）3. R r red ruler. The letter R is for __________ ruler. A. blue B. green C. purple D. red ★ 拓展题：（选择题） ★（ ）1. Which is the correct full answer? — What letter is this? A. A. B. It's A. C. This is A. D. It's the letter A. ★（ ）2. S s school song. "S" stands for __________ song. A. blue B. school C. purple D. red ★（ ）3. T t tea time. The letter T is for __________ time. A. coffee B. milk C. tea D. juice 考点六：a / an 的选择（辅音vs元音开头） ◇ 基础题：（选择题） ◇（ ）1. It's __________ orange.（橙子） A. a B. an C. the D. / ◇（ ）2. It's __________ red apple. A. a B. an C. the D. / ◇（ ）3. This is __________ umbrella. A. a B. an C. the D. / ▷ 提升题：（选择题） ▷（ ）1. It's __________ purple pencil. A. a B. an C. the D. / ▷（ ）2. This is __________ orange pen.（注意：pen不是orange） A. a B. an C. the D. / ▷（ ）3. It's __________ quiet queen. A. a B. an C. the D. / ★ 拓展题：（选择题） ★（ ）1. Which uses "an" correctly? A. an red pen B. an blue sky C. an orange D. a apple ★（ ）2. It's __________ X-ray box. A. a B. an C. the D. / ★（ ）3. This is __________ yellow yo-yo. A. a B. an C. the D. / 考点七：What letters can you see? 复数字母 ◇ 基础题：（选择题） ◇（ ）1. — What letters can you see? — I __________ A, T and M. A. see B. sees C. can see D. seeing ◇（ ）2. — What letters can you __________? — I see B and D. A. look B. see C. hear D. say ◇（ ）3. Letters are __________. They are everywhere. A. nowhere B. somewhere C. everywhere D. where ▷ 提升题：（选择题） ▷（ ）1. — What letters can you see on the box? — __________ X and Z. A. I see B. I can see C. I seeing D. I looks ▷（ ）2. U u uncle's umbrella. "U" is for __________ umbrella. A. a B. an C. the D. / ▷（ ）3. V v vegetable van. "V" is for __________ van. A. a B. an C. the D. / ★ 拓展题：（选择题） ★（ ）1. Which sentence means "字母无处不在"? A. Letters are nowhere. B. Letters are somewhere. C. Letters are everywhere. D. Letters are where. ★（ ）2. — What letters can you see in ATM? — __________. A. I see A, T and M B. I see ATM C. I see letters D. I can sees A ★（ ）3. W w winter wind. "W" is for __________ wind. A. summer B. spring C. autumn D. winter 考点八：Yes, it is. / No, it isn't. 缩写与完全形式 ◇ 基础题：（选择题） ◇（ ）1. — Is it green? — Yes, __________ is. A. it B. this C. that D. they ◇（ ）2. — Is it purple? — No, it __________. A. is B. isn't C. not is D. not ◇（ ）3. It is blue.（缩写为）__________ A. It's blue. B. Is blue. C. It blue. D. Its blue. ▷ 提升题：（选择题） ▷（ ）1. — Is it red? — No, __________ isn't. It's yellow. A. this B. that C. it D. they ▷（ ）2. Which is the correct short form? A. It is → It's B. Is not → Isn't C. It is → Its D. Both A and B ▷（ ）3. — Is it the letter O? — Yes, __________ is. A. this B. that C. it D. they ★ 拓展题：（选择题） ★（ ）1. In "No, it isn't.", which part is contracted? A. No B. it C. is not → isn't D. it is → it's ★（ ）2. — Is it blue? — __________. It's green. A. Yes, it is B. No, it is C. No, it isn't D. Yes, it isn't ★（ ）3. "This is red." Can we say "This's red."? A. Yes, we can. B. No, we can't. C. Sometimes. D. Always. 考点九：颜色词作名词与作形容词辨析 ◇ 基础题：（选择题） ◇（ ）1. In "It's red.", "red" is a __________ word. A. verb B. noun (名词) C. adjective (形容词) D. pronoun ◇（ ）2. The orange is orange. The first "orange" means __________. A. 橙色（形容词） B. 橙子（名词） C. 橘子汁 D. 橙子树 ◇（ ）3. I like __________.（我喜欢蓝色。） A. blue B. a blue C. the blue D. blues ▷ 提升题：（选择题） ▷（ ）1. In "This is a red pen", "red" is used as a/an __________. A. noun B. verb C. adjective D. adverb ▷（ ）2. — What colour is the sky? — It's __________. A. a blue B. blue C. the blue D. blues ▷（ ）3. The pencil is purple. "Purple" describes the __________ of the pencil. A. size B. colour C. shape D. name ★ 拓展题：（选择题） ★（ ）1. Which sentence uses "orange" as a noun? A. It's orange. B. The orange is orange. C. This is orange. D. Orange is my favourite colour. ★（ ）2. In "a purple pencil", the word order is: article + __________ + noun. A. verb B. adjective C. pronoun D. adverb ★（ ）3. — What colour is the letter P? — It's __________ pencil. A. purple B. a purple C. the purple D. purples 考点十：综合运用——情景交际与句型辨析 ◇ 基础题：（选择题） ◇（ ）1. 当你想问"现在这是什么颜色？"，应说： A. What is this? B. What colour is this now? C. Is it blue? D. This is red. ◇（ ）2. 当你想说"太酷了！"，应说： A. That's cool! B. It's cold! C. This is cool. D. Is it cool? ◇（ ）3. 当你想确认"它是蓝色的吗？"，应说： A. It is blue. B. Is it blue? C. What colour is it? D. Blue is it. ▷ 提升题：（选择题） ▷（ ）1. Olivia说："Look, red and yellow." Jam问："What colour is this now?" Olivia应回答： A. It's blue. B. It's green. C. It's orange. D. It's purple. ▷（ ）2. Chen Wei问："What letters can you see?" Lily应回答： A. I am fine. B. I see A and B. C. It's red. D. Yes, it is. ▷（ ）3. Zhou Kai说："Hold on, please." Bella应理解为： A. 快点！ B. 等一下！ C. 再见！ D. 谢谢！ ★ 拓展题：（选择题） ★（ ）1. Zhang Hao想用英语说"字母无处不在"，他应该说： A. Letters are somewhere. B. Letters are nowhere. C. Letters are everywhere. D. Letters are where. ★（ ）2. Bella在Xiamen看到蓝天大海，她感叹说： A. That's cool! B. That's warm! C. That's cold! D. That's small! ★（ ）3. Chen Wei问："Is the letter Q quiet?" Olivia回答： A. Yes, it is. Q is for quiet queen. B. No, it isn't. C. It's blue. D. Yes, it isn't. 逐题详细解析 考点1：What colour is this/it? 询问颜色及回答 ◇ 基础题解析 第1题 答案：B 询问颜色用 What colour is it? 第2题 答案：B 询问颜色用 What colour. 第3题 答案：A 回答用 It's + 颜色. ▷ 提升题解析 第1题 答案：A orange 既是颜色也是水果，此处问颜色. 第2题 答案：B What colour 询问颜色. 第3题 答案：C this 是单数，be 动词用 is. ★ 拓展题解析 第1题 答案：B 询问颜色用 What colour is...? 第2题 答案：A 回答颜色用 It's + 颜色. 第3题 答案：B 回答 It's green. 对应问句 What colour is it? 考点2：Is it + 颜色? 一般疑问句及回答 ◇ 基础题解析 第1题 答案：B 否定回答用 No, it isn't. 第2题 答案：A 回答用 Yes, it is. 第3题 答案：A 肯定回答用 Yes, it is. ▷ 提升题解析 第1题 答案：C 否定回答 No, it isn't. 第2题 答案：B 肯定回答 Yes, it is. 第3题 答案：B It's + 颜色词，不加 a. ★ 拓展题解析 第1题 答案：B 否定回答固定用 No, it isn't. 第2题 答案：C 否定用 No, it isn't. 后面补充正确颜色. 第3题 答案：B 肯定回答后接着描述 It's a red ruler. 考点3：This is + 颜色. 介绍颜色 ◇ 基础题解析 第1题 答案：A 介绍眼前的颜色用 This is... 第2题 答案：B This is blue. 介绍颜色. 第3题 答案：B ▷ 提升题解析 第1题 答案：A 两个近处颜色都用 This is... 第2题 答案：A 否定后纠正用 This is red. 第3题 答案：A 介绍近处物品用 This is... ★ 拓展题解析 第1题 答案：B This 指近处，That 指远处. 第2题 答案：B What colour is this? 回答用 It's orange. 第3题 答案：A 介绍近处物品用 This is blue. 考点4：颜色混合 Red+yellow=orange 等 ◇ 基础题解析 第1题 答案：C 红色+黄色=橙色 orange. 第2题 答案：C 红色+蓝色=紫色 purple. 第3题 答案：D 黄色+蓝色=绿色 green. ▷ 提升题解析 第1题 答案：C Red + yellow = orange. 第2题 答案：D Red + blue = purple. Wow! 第3题 答案：D Yellow + blue = green. That's cool! ★ 拓展题解析 第1题 答案：D 三种原色混合通常得到棕色 brown. 第2题 答案：C Red + yellow = orange. 第3题 答案：D Red + blue = purple. That's cool! 考点5：字母认知 What letter is this? ◇ 基础题解析 第1题 答案：A 回答用 It's the letter + 大写字母. 第2题 答案：B It's the letter B. 第3题 答案：B O o 对应 orange. ▷ 提升题解析 第1题 答案：A 回答用大写字母 C. 第2题 答案：C P p 对应 purple pencil. 第3题 答案：D R r 对应 red ruler. ★ 拓展题解析 第1题 答案：D 完整回答是 It's the letter A. 第2题 答案：B S s 对应 school song. 第3题 答案：C T t 对应 tea time. 考点6：a / an 的选择（辅音vs元音开头） ◇ 基础题解析 第1题 答案：B orange 以元音 /ɒ/ 开头，用 an. 第2题 答案：A red 以辅音 /r/ 开头，用 a. 第3题 答案：B umbrella 以元音 /ʌ/ 开头，用 an. ▷ 提升题解析 第1题 答案：A purple 以辅音 /p/ 开头，用 a. 第2题 答案：B pen 以辅音 /p/ 开头， 第3题 答案：A quiet 以辅音 /k/ 开头，用 a. ★ 拓展题解析 第1题 答案：C orange 以元音开头，用 an. 第2题 答案：B X-ray 以元音 /e/ 开头，用 an. 第3题 答案：A yellow 以辅音 /j/ 开头，用 a. 考点7：What letters can you see? 复数字母 ◇ 基础题解析 第1题 答案：A I see + 字母(s). 第2题 答案：B 问句用 can you see. 第3题 答案：C everywhere = 到处，处处. ▷ 提升题解析 第1题 答案：A 回答用 I see X and Z. 第2题 答案：B umbrella 以元音开头，用 an. 第3题 答案：A vegetable 以辅音开头，用 a. ★ 拓展题解析 第1题 答案：C everywhere = 到处. 第2题 答案：A ATM 中有字母 A, T, M. 第3题 答案：D W w 对应 winter wind. 考点8：Yes, it is. / No, it isn't. 缩写与完全形式 ◇ 基础题解析 第1题 答案：A Yes, it is. 不能写成 Yes, it's. 第2题 答案：B No, it isn't. 缩写形式. 第3题 答案：A It is → It's. ▷ 提升题解析 第1题 答案：C No, it isn't. It's yellow. 第2题 答案：D A和B都是正确的缩写形式. 第3题 答案：C Yes, it is. ★ 拓展题解析 第1题 答案：C is not 缩写为 isn't. 第2题 答案：C 否定回答 No, it isn't. 后补充正确颜色. 第3题 答案：B This is 不能缩写为 This's. 考点9：颜色词作名词与作形容词辨析 ◇ 基础题解析 第1题 答案：B red 在此作表语，是名词用法"红色". 第2题 答案：B 第一个 orange 是名词"橙子"，第二个是形容词"橙色的". 第3题 答案：A like + 颜色名词，不加冠词. ▷ 提升题解析 第1题 答案：C red 修饰 pen，作形容词. 第2题 答案：B It's blue. 颜色词作表语. 第3题 答案：B purple 描述颜色. ★ 拓展题解析 第1题 答案：B The orange（橙子，名词）is orange（橙色的）. 第2题 答案：B a（冠词）+ purple（形容词）+ pencil（名词）. 第3题 答案：B It's a purple pencil. 冠词+形容词+名词. 考点10：综合运用——情景交际与句型辨析 ◇ 基础题解析 第1题 答案：B What colour is this now? 询问现在是什么颜色. 第2题 答案：A That's cool! 表达赞叹. 第3题 答案：B Is it blue? 一般疑问句确认颜色. ▷ 提升题解析 第1题 答案：C Red + yellow = orange. 第2题 答案：B 回答用 I see + 字母(s). 第3题 答案：B Hold on = 等一下. ★ 拓展题解析 第1题 答案：C everywhere = 到处，处处. 第2题 答案：A That's cool! 表达对美景的赞叹. 第3题 答案：A Q q 对应 quiet queen. 学科网（北京）股份有限公司 $