七年级英语上册_一般现在时课件_外研版.ppt

* * * * * 一般现在时 动词：1.be动词 (is ,am, are ) 2.情态动词（can, must, may, need, shall） 3.行为动词（run, speak, call, say….） Ⅰ、概念： 经常、反复发生的动作或存在的状态及现在的某种状态。 1、肯定式 1)主语 + be (am/is/are)+表语 I am a student. It/ She/He is a teacher. You/They are classmates. 2)主语 +情态动词（can, must, may, need, shall） I can speak English. She must go to school. Ⅱ 、构成形式: 3).主语+行为动词（speak，say，call，go, run….） 1)I speak English. 2)She/He/It speaks English. 3)They call me Tom. 4)He runs very fast. 注意：在一般现在时态的肯定句中，当主语是第三人称单数（she, he, it），行为动词要加-s或者 -es 2.一般现在时态的否定和疑问式 (1).Be动词 She is a student. 变否定：She is not a student . 变一般疑问句：Is she a student ? 肯定否定回答：Yes ,she is . No ,she isn’t. （2）.情态动词 e.g. She can speak Chinese. 变否定：She can’t speak Chinese. 变一般疑问：Can she speak Chinese? 肯定否定回答：Yes, she can. No, she can’t. (3)行为动词 e.g. I run very fast. 变否定句：I don’t run very fast . 变一般疑问：Do you run very fast ? 肯定否定回答：Yes, I do. No, I don’t. e.g. She likes Maths. 变否定句：She doesn’t like Maths. 变一般疑问：Does she like Maths? 肯定否定回答：Yes, she does. No, she doesn’t. 注意：在一般现在时态中，当谓语动词是行为动词的时候，变否定和一般疑问句时，要借助助动词do和does帮忙。当主语是第三人称单数(she, he, it)的时候用does，其他人称用do. 借助助动词do和does以后，动词要用动词原形。 Ⅲ 、一般现在时态的用法： １、表示目前或现在存在的状态或特征. e.g. She is often late. ２、表示客观存在及普遍真理。 e.g. The earth is round. ３、表示现在经常和习惯性发生的动作，常与 sometimes, often, usually, always, everyday… 等时间状语连用。 ４、在时间状语从句中表示将来发生的动作。 e.g. If it doesn’t rain tomorrow, we’ll go to the park. ５、表示按时间或计划将要发生的动作，常与时 间状语连用，常用动词为： come, begin, go, leave, arrive, stop, start, return, E.g. Our holidays begin in a week. Ⅳ 、 就单词的正确形式填空 1.He ___ (look) tired. 2.The earth___ (go) round the sun. 3. ___ (may) I have your pen? 4.Practice ___ (make) perfect. 5.They usually____ (come) to school earlier. 6.Class___ (begin) at eight every morning. 7.When he ___ (come), we’ll go out to meet him. 8.How ____(be) your father ? 9.There ___(be) a school there. looks goes May m