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：一般现在时 be 动词在肯定句中的用法I am 或 I’m happyYou/We/They are 或 You’re/We’re/They’reHe/She/It is 或 He’s /She’s /It’s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.一般现在时 be 动词的否定句I am not 或 I’m nothappyYou/ We / They are not或 You / We / They aren’tHe / She / It is not 或 He / She / It isn’t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 。 一般现在时 be 动词的一般疑问...
