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中小学教育资源及组卷应用平台
Unit 1 You and Me 单元语法讲练
Be动词和主格
一. Be动词
be动词是英语中最常用的动词之一，它就像汉语里的“是”。但它不像其他动词那样表示动作，而是表示一种 状态、身份、特征或位置。
be动词 有三种基本形式：am, is, are。
1. 肯定句（说什么是什么）
用法取决于句子的主语（谁）。
主语 be动词 例句（中文） 例句（英文）
I (我) am 我是学生。 I am a student.
He/She/It (他/她/它) is 他是老师。
她很开心。
它是一个苹果。 He is a teacher.
She is happy.
It is an apple.
You/We/They (你/你们/我们/他们) are 你是医生。
我们是朋友。
他们在家。 You are a doctor.
We are friends.
They are at home.
口诀：
I 用am; you 用 are; is 用于he, she, it; 单用is, 复用 are.
2. 否定句（说什么不是什么）
在 am, is, are 后面直接加上 not。
I am not (I'm not) a boy. 我不是男孩。
He is not (isn't) sad. 他不伤心。
She is not (isn't) a nurse. 她不是护士。
You are not (aren't) late. 你没迟到。
They are not (aren't) here. 他们不在这里。
3. 一般疑问句（问“是不是”）
把 am, is, are 提到句子的开头（主语前面）
Are you tired 你累吗？
回答：Yes, I am. / No, I am not.
Is she your sister 她是你的姐姐吗？
回答：Yes, she is. / No, she is not.
Is it a dog 它是一只狗吗？
回答：Yes, it is. / No, it is not.
Are they from China 他们来自中国吗？
回答：Yes, they are. / No, they are not.
注意：在疑问句中，I am 要变成 Are you。
I am late. Are you late
巩固练习题
一. 请用 am, is, are 的正确形式填空（包括肯定、否定和疑问形式）
1. I ______ a student.
2. She ______ my mother.
3. They ______ from England.
4. He ______ not a doctor.
5. It ______ a big house.
6. We ______ good friends.
7. You ______ late for school.
8. The cat ______ on the chair.
9. My name ______ Anna.
10. The books ______ on the desk.
11. I ______ happy today.
12. He ______ not at home.
13. ______ you okay
14. ______ she a teacher
15. ______ they in the park
16. This ______ my book.
17. Those ______ apples.
18. I ______ not hungry.
19. She ______ very tall.
20. We ______ in the classroom.
21. ______ it cold today
22. They ______ not my brothers.
23. You ______ a nice person.
24. He ______ from Japan.
25. The dog ______ black and white.
二. 将以下句子改为否定句：
26. I am tall. ______________________________________
27. She is beautiful. ___________________________________
28. They are students. __________________________________
29. It is expensive. _____________________________________
30. We are ready. _______________________________________
三. 将以下句子改为一般疑问句，并作肯定和否定回答：
31. He is busy. ___________________________________________
32. You are right. __________________________________________
33. They are at school. _____________________________________
34. She is twenty years old. _________________________________
35. I am correct. _________________________________________
四. 根据括号内的中文提示完成句子：
36. My brother _______ (是) a driver.
37. _______ (是) you Mr. Smith
38. The girls _______ (不是) in the library.
39. _______ (是) it Monday today
40. I _______ (是) not from Beijing.
五. 综合练习：
41. —______ you ready
—No, I ______ not.
42. —______ she your English teacher
—Yes, she is.
43. —Where ______ my keys
—They ______ on the table.
44. —How ______ you
—I ______ fine, thank you.
45. —Who ______ that man
—He ______ my father.
46. —What ______ these
—They ______ my pencils.
47. — the window open
—No, it ______ closed.
48. —We ______ tired. Let's rest.
—That ______ a good idea.
49. —______ your parents at home
—No, they ______ at work.
50. —I ______ sorry. I ______ late.
—That ______ okay.
练习题答案与解析
一. 请用 am, is, are 的正确形式填空（包括肯定、否定和疑问形式）。
1. am (主语是 I)
2. is (主语是 She)
3. are (主语是 They)
4. is (He is not... 的缩写)
5. is (主语是 It)
6. are (主语是 We)
7. are (主语是 You)
8. is (主语是 The cat，单数)
9. is (主语是 My name，单数)
10. are (主语是 The books，复数)
11. am (主语是 I)
12. is (He is not...)
13. Are (疑问句，主语是 you)
14. Is (疑问句，主语是 she)
15. Are (疑问句，主语是 they)
16. is (主语是 This，单数)
17. are (主语是 Those，复数)
18. am (I am not...)
19. is (主语是 She)
20. are (主语是 We)
21. Is (疑问句，主语是 it)
22. are (They are not...)
23. are (主语是 You)
24. is (主语是 He)
25. is (主语是 The dog，单数)
二. 否定句：
26. I am not tall. (am后面加not)
27. She is not beautiful. (is后面加not)
28. They are not students. (are后面加not)
29. It is not expensive. (is后面加not)
30. We are not ready. (are后面加not)
三. 一般疑问句及回答：
31. Is he busy -> Yes, he is. / No, he is not.
32. Are you right -> Yes, I am. / No, I am not.
33. Are they at school -> Yes, they are. / No, they are not.
34. Is she twenty years old -> Yes, she is. / No, she is not.
35. Are you correct -> Yes, I am. / No, I am not. (注意：I am... 变成疑问句要用Are you... )
四. 根据中文完成句子：
36. is (“是”，主语brother是单数)
37. Are (“是”，疑问句，主语是you)
38. are not (“不是”，主语girls是复数)
39. Is (“是”，疑问句，主语是it)
40. am (“是”，主语是I)
五. 综合练习：
41. Are, am (问“你准备好了吗？”，“不，我没有。”)
42. Is, is (问“她是你的英语老师吗？”，“是的，她是。”)
43. are, are (问“我的钥匙在哪？”“它们在桌子上。”主语keys是复数)
44. are, am (问“你好吗？”“我很好。”)
45. is, is (问“那个男的是谁？”“他是我爸爸。”主语that man是单数)
46. are, are (问“这些是什么？”“它们是我的铅笔。”主语these是复数)
47. Is, is (问“窗户开着吗？”“不，它关着。”主语window是单数)
48. are, is (“我们累了。我们休息一下吧。”“那是个好主意。”主意idea是单数)
49. Are, are (问“你的父母在家吗？”“不，他们在上班。”主语parents是复数)
50. am, am, is (“对不起，我迟到了。”“没关系。”)
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