五:人称和数 六: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, 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: |