小学英语句型专项归类 1.肯定句:是指用肯定的语气来陈述的句子.2,否定句:含有否定词或表示否定意义词的句子.例I'm a student. I'm not a student. She is a doctor. She is not (isn't) a doctor. He works in a hospital. He does not (doesn't) work in a hospital. There are four fans in our classroom. There are not (aren't) four fans in our classroom. He will eat lunch at 12:00. He will not (won't) eat lunch at 12:00.I watched TV yesterday evening. 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，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...
