
  【句型专项归类】
	
	  1、肯定句:是指用肯定的语气来陈述的句子,如:I’m a student. She is a doctor. He works in a hospital.
	
	  There are four fans in our classroom. He will eat lunch at 12:00. I watched TV yesterday evening.
	
	  2、否定句:含有否定词或表示否定意义词的句子,如:I’m not a student. She is not (isn’t) a doctor.
	
	  He does not (doesn’t) work in a hospital. There are not (aren’t) four fans in our classroom.
	
	  He will not (won’t) eat lunch at 12:00. I did not (didn’t) watch TV yesterday evening.
	
	  ☆注意☆
	
	  小结:否定句主要是在肯定句的基础上加上了否定词 “not”。有动词be的句子则“not”加在be后面,可缩写成“isn’t,aren’t”,但am not 一般都分开写。没有动词be的句子则要先在主要动词的前面加上一个助动词(do,does,did),然后在它后面加上“not”,你也可以把它们缩写在 一起如“don’t , doesn’t , didn’t )。这三个助动词要根据人称和时态来选择,其中“does”只用于一般现在时主语是第三人称单数的情况,而“did”只用于一般过去时,不论主语是什么人 称和数,都用“did” 。
	
	  3、一般疑问句:是指询问事实的句子,此类句子必须用“yes”,或“no”来回答。如:Are you a student? Yes, I am / No, I’m not.
	
	  Is she a doctor? Yes, she is. / No, she isn’t.
	
	  Does he work in a hospital? Yes, he does. / No, he doesn’t.
	
	  Are there four fans in our classroom? Yes, there are. / No, there aren’t.
	
	  Are you going to buy a comic book tonight? Yes, I am. / No, No, I am not. (Yes, we are. / No, we aren’t.)
	
	  Will he eat lunch at 12:00? Yes, I will. / No, I will not(won’t).
	
	  Are they swimming? Yes, they are. / No, they aren’t.
	
	  Did you watch TV yesterday evening? Yes, I did. / No, I didn’t.
	
	  ☆注意☆
	
	  小结:一般疑问句是在肯定句的基础上
	
	  ①把动词be调到首位,其他照写,末尾标点符号变成问号即可。
	
	  ②没有动词be的句子则要在句首加上一个助动词(do,does,did)再把紧跟在后面的动词变回原形,末尾标点符号变成问号即可。
	
	  这三个助动词也要根据人称和时态来选择,其中“does”只用于一般现在时主语是第三人称单数的情况,而“did”只用于一般过去时,不论主语是什么 人称 和数,都用“did” 。一般疑问句有个重要的原则就是问和答要一致,即问句里的第一个单词(助动词)和简略答句里的这个词是一致的。
	
	  4、特殊疑问句:以特殊疑问词(what , where , who , which , when , whose , why , how等)开头引导的句子。此类句子应该问什么就答什么,不能用“yes 、no”来回答。如:
	
	  What is this? It’s a computer.
	
	  What does he do? He’s a doctor.
	
	  Where are you going? I’m going to Beijing.
	
	  Who played football with you yesterday afternoon? Mike.
	
	  Which season do you like best? Summer.
	
	  When do you usually get up? I usually get up at 6:30.
	
	  Whose skirt is this? It’s Amy’s.
	
	  Why do you like spring best? Because I can plant trees.
	
	  How are you? I’m fine. / I’m happy.
	
	  How did you go to Xinjiang? I went to Xinjiang by train.
	
	  其中how又可以和其他一些形容词连用组成特殊疑问词组用来提问,如: how many(多少(数量)), how much(多少(钱)), how tall(多高), how long(多长), how big(多大), how heavy(多重)
	
	  例句:How many pencils do you have? I have three pencils.
	
	  How many girls can you see? I can see four girls.
	
	  How many desks are there in your classroom? There are 51.
	
	  ☆注意☆
	
	  小结:
	
	  how many 用来提问可数名词的数量,主要有以上三种句式搭配,
	
	  How many + 名词复数 + do you have? 你有多少……?
	
	  How many + 名词复数 + can you see? 你能看见多少……?
	
	  How many + 名词复数 + are there…? 有多少……?
	 
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