中考英语语法现在完成时态共16张PPT)

现在完成时 现在完成时的含义及用法 现在完成时表示过去发生的动作,并对现在有影响。 现在完成时表示从过去一直持续到现在的动作或状态。 现在完成时的基本句型： 肯定式： 主语 + 助动词have/has + 动词的过去分词. 否定式: 主语 + 助动词have/has + not + 动词的过去分词. 疑问式： 助动词Have/Has + 主语 + 动词的过去分词? 用法① 现在完成时表示过去发生的动作,并对现在有影响。 Someone has broken the window. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) I haven’t read that book yet . (不了解书的内容) I have just cleaned my hands. (手是干净的) 此时，现在完成时常与already(已经), yet(已经), just(刚刚),ever(曾经)等词连用，通常放在助动词之后，过去分词之前。 already: 常用于肯定句中. yet: 用于否定句，翻译为还没。疑问句尾.翻译为已经 你已经找到你的书了吗? (find-found) 他们在这个城市建了许多房子. (build-built) Judy还没到达. (arrive-arrived) 你吃过早饭了吗? (have-had) Have you found your book yet? They have built many buildings in this city. Judy hasn’t arrived yet. Have you had breakfast ? 试一试 用法② 现在完成时表示从过去一直持续到现在的动作或状态。 She has learned English for 5 years. He has lived in Beijing since ( 自从)he was born . Have you stayed here since ( 自从) 3 o’clock? 常与for, since引导的时间短语或从句连用. for+ 时间段 since+时间点 , since+ 句子，s