七年级牛津版上册课件：Unit1Grammar.ppt

* Unit 1 This is me! Look at the sentences and find the rules of simple present tense. I am a student. ★ 描述客观事实 I am from China. 我来自中国。 ★ 描述目前的事实。 Sandy is my classmate. He is 12 years old. 他十二岁。 ★ 描述现在的状态。 We are in class 1. We are very happy. 我们非常高兴。 英语句子的时态是指句中谓语动词在不同的时间和状况下所使用的某种动词形式。 We use the simple present tense when we talk about facts and states. 我们常使用一般现在时描述客观事实、目前的事实和现在的状态。 He is from Nanjing. 他从南京来。 Lee is my friend. 李是我的朋友。 My hair is long. 我是长头发。 注意 主语可以是人称代词，也可以是名词，动词be的选择要与主语相一致。 The dog is very lovely. 这只小狗很可爱。 These apples are big and red. 这些苹果又大又红。 “ be ”动词的一般现在时形式有三种：am, is , are。 be动词用法口诀： “我(I)”用am , “你(you)”用are, “is用于“他(he)”、“她(she)”、“它(it)”, 复数人称都用“are”。 如果主语是代词，动词be与前面主语在一起时，在非正式行文中可以缩写。如： I am = I’m You are = You’re She is = She’s He is = He’s It is = It’s We are = We’re They are = They’re be 用法如下： He/She/It is 或 He’s /She’s /It’s You/We/They are或 You’re/We’re/They’re happy I am 或 I’m 一般现在时be动词在肯定句中的用法 例句： 1. I am a teacher. 2. You are students. 3. We are good friends. 4. They are on the football field. 5. Simon and Sandy are classmates. 6. He is a polite and helpful boy. 7. It is an e-dog. 8. Sandy is tall and slim. 9. Her hair is long. He / She / It is not 或 He / She / It isn’t You/ We / They are not 或 You / We / They aren’t happy I am not或 I’m not 一般现在时be动词的否定句 动词be一般现在时的否定句是在be后面加not构成。动词be与not可以缩写，如： is not = isn’t; are not = aren’t。 is. are. am. he/she/it you/ we/ they Yes, happy? he/she /it you/we /they I Is Are I Am 一般现在时be动词的 一般疑问句及其肯定答 动词be一般现在时的一般疑问句是将be提前于句首构成。 he/she/it is not 或 isn’t you/we/they are not或aren’t I am not或 I’m not happy. No, 一般疑问句的否定回答 缩写形式小结： I’m = I am you’re/we’re/they’re = you/ we/ they are he’s/she’s/ it’s = he/ she/ it is isn’t = is not aren’t = are not 例句： (一) be 动词一般现在时的否定句: 1. I am not a student. 2. You aren’t good at swimming. 3. Simon isn’t tall. (二) 一般疑问句及其肯定回答和否定回答 1. Am I the teacher?