初一英语现在完成时.ppt

初一英语课 词汇(words)：语音、拼写（字母组合）、意义、词法及用法 中小学英语 句子(sentences)：句型 时态 语态 写作(writing) 阅读(reading)：课文阅读与课外阅读 一般现在时：I do my homework everyday 一般过去时：I did my homework yesterday 现在进行时：I am doing my homework 一般将来时：I will do my homework tomorrow. 时态 不同的时态所代表的含义也不一样 时态 动词原形 一般现在时 现在完成时 be+动词ing形式 现在进行时 一般将来时 will / shall + 动词原形be going to+动词ing 助动词have/has + 过去分词 一般过去时 动词过去式 一般现在时 一般现在时： 1.Someting happens all the time 2.Something happens repeatly 3.Something is true in general I work but he works You learn but your sister learns They teach ,but my sister teaches 现在完成时 Eg: he drives a bus (he is a bus driver ) 现在完成时 I have had a wonderful holiday I had a wonderdful holiday 现在完成时 基本结构:have /has + 动词过去分词 如: I /we/they/you have Finished Lost Done been He/she /it has Tom / my mom/your sister /his brother 现在完成时1 过去发生的事情（但现在的情况与过去一样） Tom is looking for his key.he can’t find it. He has lost his key He has lost his key = He lost it,and he still doesn’t have it Tom has found his key .he has it now . 现在完成时1 Tom is looking for his key. he can’t find it .he has lost his key (this means that he doesn’t have his key now ) *与过去时的区别 Ten minute later Can we say :1. he has lost his key ? Can we say :2. he lost his key 句2只是描述他过去掉过钥匙， 但是现在的状况有两种可能 1.钥匙没有找回来 2.钥匙找回来了 A B He lost his key 1.Miss Brown, we ________ cleaning our classroom. Can we go home now? A. finish B. finishing C. are finished D. have finished 现在完成时是一种现在的时态， 它告诉的是与现在有关信息. 过去时只是描述过去发生的事情，与现在没关系 *与过去时的区别 现在完成时1 现在完成时2 过去发生的事情（刚发生不久的事情）: People have started to use iphone 7 recently. Who has invented the new robot? 现在完成时2 People started to used phone in 1900 Who invented the computer? *与过去式的区别 People have started to use iphone 7 recently Who has invented the new robot? 现在完成时2 关键词： just Already Yet “Are you hungry” “no ,I’ve just had lunch” “Don’t forget to finish your home work.” “ I have already finished it already ” Has it stopped raining yet? I’ve written the email,but i haven’t