The verb to be — am, is, are · be 动词 — am、is、are
"to be" — the most important verb
- The verb to be means "is / am / are".
- We use it to say what something is or where it is.
- I am Tom. She is happy. They are here.
I am a student. The cat is a teacher. The cat disagrees.
"to be" —— 最重要的动词
- be 动词 (the verb to be) 表示"是 / 在"。
- 用它来说某物是什么或在哪里。
- 我I 是am 汤姆Tom.(我是汤姆。)
我是学生。猫是老师。猫不同意。
Three forms
- I → am, he / she / it → is, you / we / they → are.
- I am a student. He is my friend. We are ready.
- Short forms: I'm, he's, she's, we're, they're.
三种形式
- I → am、he / she / it → is、you / we / they → are。
- 他He 是is 我的my 朋友friend.(他是我的朋友。)
- 缩写:I'm、he's、she's、we're、they're。
Match the subject to am / is / are · 把主语和 am / is / are 配对
I → am; he / she / it → is; you / we / they → are. · I → am;he / she / it → is;you / we / they → are。
Choose the correct word: She ___ happy. · 选出正确的词:She ___ happy。
he / she / it → is: “She is happy.” · he / she / it → is:She is happy。
Complete: They ___ from China. · 填空:They ___ from China。
you / we / they → are: “They are from China.” · you / we / they → are:They are from China。
Translate into English: 我是一名学生。 · 翻译成英语:我是一名学生。
I → am, and use “a” before a singular noun: “I am a student.” · I → am,单数名词前加 a:I am a student。
Negatives
- Add not after the verb: I am not, he is not, they are not.
- Short forms: isn't, aren't (and I'm not).
- She isn't at home.
否定
- 在 be 动词后加 not:I am not、he is not、they are not。
- 缩写:isn't、aren't(以及 I'm not)。
- 她She 不在isn't 在at 家home.(她不在家。)
Questions
- Put be before the subject: Are you ready? Is he a teacher?
- Short answers: Yes, I am. / No, he isn't.
疑问
- 把 be 动词放到主语前面:（是吗）Are 你you 准备好ready?(你准备好了吗?)
- 简短回答:Yes, I am. / No, he isn't.
Is this correct? “He are a teacher.” · 这句对吗? “He are a teacher.”
“he” takes “is”, not “are”: “He is a teacher.” · he 用 is,不用 are:He is a teacher。
Common mistakes
- ❌ He busy. → ✓ He is busy. — every sentence needs a verb.
- ❌ I am go to school. → ✓ I go to school. — don't use be + another verb.
- ❌ I am agree. → ✓ I agree. — agree is already a verb.
- ❌ Yes, I'm. → ✓ Yes, I am. — short answers never end with a short form.
常见错误
- ❌ He busy. → ✓ He is busy。—— 英语句子必须有动词;中文"他很忙"不能照搬。
- ❌ I am go to school. → ✓ I go to school。—— be 和普通动词不能叠用。
- ❌ I am agree. → ✓ I agree。—— agree 本身就是动词,前面不加 am。
- ❌ Yes, I'm. → ✓ Yes, I am。—— 简短回答的末尾不能用缩写。
Match each mistake to its correction. · 把每个错句和改正后的句子配对。
Every sentence needs be (or another verb) — and a short answer ends with the full form. · 每个句子都要有 be(或其他动词);简短回答要用完整形式结尾。
Which sentence is correct? · 哪个句子是正确的?
he / she / it → is: “He is busy today.” The others should be “I agree” and “They are”. · he / she / it → is:He is busy today。另两句应为 I agree、They are。
- to be: I am, he / she / it is, you / we / they are.
- Negative: add not (isn't / aren't).
- Question: put be before the subject.
- be 动词:I am、he / she / it is、you / we / they are。
- 否定:加 not(isn't / aren't)。
- 疑问:把 be 动词放到主语前面。
Introduce yourself. Write one sentence using the verb “to be” (for example: your name, your age, or where you are from). · 介绍一下自己。用 be 动词写一句话(例如:你的名字、年龄,或来自哪里)。
Example: “I am from Beijing.” or “I am twelve years old.” · 例如:I am from Beijing。或 I am twelve years old。