专项突破 五 句型（PPT版）-2021【通城1典】小学英语总复习（外研版三年级起点）

外研版 第二部分　专项突破 五　句　型 1. 陈述句的功能及结构特征 陈述句是用来说明一个事实的句子，其主要功能是传递信息、提供情况，用来肯定或否定某个事物、某件事或某种情况。陈述句的结构特征通常是主语在前，谓语在后，读时用降调，句尾用句号。如： My mother is going to buy me a new dress. 我妈妈打算给我买一条新的连衣裙。 2. 陈述句的肯定句变为否定句 (1) 句中有 be 动词或情态动词时，在be动词或情态动词后直接加 not。如： She is an English teacher. →She is not an English teacher. You can park your car here. →You cannot park your car here. (一) 陈 述 句 (2) 句中无 be 动词和情态动词时，在谓语动词前加助动词 don’t, doesn’t, didn’t 或 won't，原来的动词要用原形。如： Mike gets up early every morning. →Mike doesn't get up early every morning. (3) 否定式的缩略形式 is not ＝ isn't　　　　　are not ＝ aren't　 was not ＝ wasn't were not ＝ weren't can not ＝ can't could not ＝ couldn't do not ＝ don't does not ＝ doesn't did not ＝ didn’t　 will not ＝ won't　 [典例精析] (2018•广元)用所给词的适当形式填空。 She ________(not do) any housework last weekend. 解析：无 be 动词或情态动词的一般过去时的否定句在谓语动词前加助动词didn't，原来的动词改为原形。 答案：didn't do [小试身手] 改为否定句。 You can cross the road now. You ________ ________ the road now. can't cross 一、用所给词的适当形式填空。 1. Sam and Tom often ________(come) to school by bus. 2. My animal friend ________(have) a short tail and four legs. It can ________(run) and ________(jump)． 3. Look! The dog ____________(laugh) at the mouse. 4. I'll ________(read) books about Australia. 5. You must ________(look) for a zebra crossing. 二、单项选择。 (　　)1. It often ________ here in winter. Tomorrow it will be ________ again. A. snowy； snow B. snows; snowy C. snow; snowy come has run jump is laughing read look B (　　)2. My hobby is ________． A. going shopping B. go shopping C. go to shop (　　)3. There isn't ________ water in your glass, and here's ________ for you. A. some; any B. any; any C. any; some (　　)4. Helen ________ beautifully and she likes ________ very much. A. dance; dance B. dancing; dances C. dances; dancing (　　)5. We shouldn't ________ in class.