内容正文:
七年级英语上册 Unit 1 This is me!
语法专项精讲与分层精练
一、语法精讲:含be动词的一般现在时
在第一单元,我们重点学习用be动词的一般现在时来介绍自己和他人。这个时态主要用来表达三件事:说清楚“我是谁”(身份)、描述“我怎么样”(状态或外貌)、说明“我在哪里”(位置)。比如“I am a student.”是身份,“She is tall.”是外貌,“We are in the classroom.”是位置。
be动词在现在时里有三个“分身”:am、is、are。它们怎么选,完全取决于主语是谁。请记住这条黄金规则:
主语是 I,永远搭配 am。肯定句可缩写为 I’m,否定句 I am not 可以缩写成 I’m not,但绝对没有 I amn’t 这种写法。
主语是 you(无论是“你”还是“你们”),一律搭配 are。肯定缩写 You’re,否定缩写 aren’t。
主语是 he / she / it 或任何一个单数的人名、物名(比如 Millie, my father, the cat),都用 is。肯定缩写 He’s / She’s / It’s,否定缩写 isn’t。
主语是 we / they 或复数名词(比如 my parents, the students),都用 are。否定缩写 aren’t。
记忆口诀:“I用am,you用are,is连着he/she/it;单数名词用is,复数名词全用are。”
肯定句结构:主语 + be动词 + 其他。例如:They are very friendly.
否定句结构:主语 + be动词 + not + 其他。例如:They are not very friendly. 口语中常缩写为 aren’t。
一般疑问句结构:Be动词 + 主语 + 其他?例如:Are they very friendly? 回答用 Yes, 主语 + be动词. 或 No, 主语 + be动词 + not.
特别提醒:如果原句主语是 I,变疑问句时要将 I 改为 you,am 改为 are。例如:I am a new student. → Are you a new student? 答语为 Yes, I am. 或 No, I’m not.
二、分层精练
Level 1 基础巩固:用 am / is / are 填空
1. I ______ a student at Sunshine Middle School.
2. She ______ my new classmate.
3. You ______ very friendly.
4. We ______ in the same class.
5. These books ______ on the desk.
6. My brother ______ tall and slim.
7. They ______ all good at sport.
8. This ______ my English teacher, Miss Wang.
9. The girls ______ Kitty and Sandy.
10. I ______ 12 years old.
Level 2 能力提升:句型转换
A. 把下列句子改成否定句
1. I am a Chinese student.
2. She is from Shanghai.
3. They are my good friends.
4. We are happy at our new school.
5. It is a cute dog.
B. 把下列句子改成一般疑问句,并分别写出肯定和否定回答
6. I am a teacher.
疑问句:_________________________________
肯定回答:_________________ 否定回答:_________________
7. He is good at Maths.
疑问句:_________________________________
肯定回答:_________________ 否定回答:_________________
8. They are in the classroom.
疑问句:_________________________________
肯定回答:_________________ 否定回答:_________________
C. 把下列句子改成复数形式(主语和be动词都要变)
9. She is a student.
10. I am from China.
11. This is an English book.
Level 3 综合运用:补全对话
对话一
A: Hello! I ______ Millie. What ______ your name?
B: My name ______ Simon.
A: ______ you in Class 1, Grade 7?
B: Yes, I ______. What about you?
A: I ______ in Class 1, too. We ______ classmates!
B: Great! Who ______ that girl over there?
A: She ______ Sandy. She ______ tall and slim.
对话二
A: Mum, this ______ my new friend, Daniel.
B: Hi, Daniel. Nice to meet you. Where ______ you from?
C: I ______ from Nanjing.
B: ______ your parents in Nanjing too?
C: Yes, they ______.
A: Daniel and I ______ in the same class. He ______ good at science.
B: That ______ wonderful!
Level 4 挑战自我:改错
下面每个句子都有一处错误,请找出来并改正。
1. I is 12 years old.
→ _________________________________
2. They am very friendly.
→ _________________________________
3. She are interested in music.
→ _________________________________
4. We is in the classroom now.
→ _________________________________
5. Are he your new teacher?
→ _________________________________
6. You is a good student.
→ _________________________________
7. The boys is on the playground.
→ _________________________________
8. My sister and I am in the same school.
→ _________________________________
Level 5 拓展延伸:汉译英
1. 我是一名七年级的学生。
2. 她来自上海。
3. 我们在阳光中学。
4. 他们都很友好。
5. 你擅长运动吗?
6. 这本书在桌子上吗?不,它不在。
7. 我的新同学们都很有趣。
8. 她不是我的姐姐,她是我的好朋友。
解析版答案
分层精练
Level 1 答案
1. am 2. is 3. are 4. are 5. are
6. is 7. are 8. is 9. are 10. am
Level 2 答案
A. 否定句
1. I am not a Chinese student. / I’m not a Chinese student.
2. She is not from Shanghai. / She isn’t from Shanghai.
3. They are not my good friends. / They aren’t my good friends.
4. We are not happy at our new school. / We aren’t happy at our new school.
5. It is not a cute dog. / It isn’t a cute dog.
B. 一般疑问句及回答
6. 疑问句:Are you a teacher?
肯定回答:Yes, I am. 否定回答:No, I’m not.
7. 疑问句:Is he good at Maths?
肯定回答:Yes, he is. 否定回答:No, he isn’t.
8. 疑问句:Are they in the classroom?
肯定回答:Yes, they are. 否定回答:No, they aren’t.
C. 改为复数
9. They are students. 10. We are from China. 11. These are English books.
Level 3 答案
对话一: am, is, is, Are, am, am, are, is, is, is
对话二: is, are, am, Are, are, are, is, is
Level 4 改错答案及解析
1. I is → I am(I 永远搭配 am)
2. They am → They are(they 是复数,用 are)
3. She are → She is(she 是单数,用 is)
4. We is → We are(we 是复数,用 are)
5. Are he → Is he(he 是单数,疑问句开头用 Is)
6. You is → You are(you 搭配 are)
7. The boys is → The boys are(boys 是复数名词)
8. My sister and I am → My sister and I are(主语是两个人,相当于复数,用 are)
Level 5 汉译英参考答案
1. I am a student in Grade 7. / I am a Grade 7 student.
2. She is from Shanghai.
3. We are at Sunshine Middle School.
4. They are all very friendly.
5. Are you good at sport? (sports 也可)
6. Is the book on the desk? No, it isn’t.
7. My new classmates are all very interesting.
8. She is not my sister. She is my good friend. / She isn’t my sister. She’s my good friend.
易错小提醒(供核对后复习)
I 和 is 永远不能搭配,只能 I am。
变疑问句时,若原句是 I am ...,一定要改成 Are you ...?
am not 只能缩写成 I’m not,不要写成 I amn’t。
复数主语(we, they, 复数名词)必须用 are,单数主语(he, she, it, 单数名词)必须用 is。
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