Unit12 过去完成时课件2023-2024学年人教版英语九年级全册

九下语法：过去完成时 一、定义 I had finished reading the novel by nine o'clock last night. 总体上说，它属于“过去”这一时间段内发生的事情，表达的是在某个过去动作或时间点之前发生的动作，即“过去的过去”，与现在毫不相关 二、构成 肯定式：主语＋助动词had ＋过去分词＋其他   eg: I had cleaned the room by the time my mom came back. （妈妈回来之前，我已经打扫过房间了。) 否定式：主语 + had + not(hadn’t) + 过去分词+其他。 eg: I said I hadn't learnt Lesson 20 yet.  (我说我还没有打扫过房间了。) 疑问句：Had + 主语 + 过去分词 + 其他。 eg: Had you ever seen such an exciting match before?  (4) 简略答语：Yes, 主语 + had./ No, 主语 + hadn’t. eg: Yes, I had. / No, I hadn't. 三、过去分词 1. 规则动词： 规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。 四点变化规则： (1).一般动词，在词尾直接加“ ed ”。 work—worked—worked ,visit—visited—visited (2).以“ e ”结尾的动词，只在词尾加“ d ”。 live—lived—lived , (3)、以“辅音字母 + y ”结尾的动词，将y 变为i，再加“ ed ”。 study—studied—studied ,cry—cried—cried (4)、重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。 stop—stopped—stopped , drop—dropped—dropped 2. 不规则动词：(见动词不规则变化表) cost—cost—cost shut—shut —shut spread —spread—spread read —read —read (read原形发音为/ri:d/,过去式和过去分词发音为/red/) come —came —come　 burn— burnt —burnt catch —caught —caught dig —dug —dug feel —felt —felt fight—fought — fought make—made — made break —broke —brokenchoose—chose—chosen write —wrote —written 四、判定标准 【即讲即练】 1. The shoes are too small for me. I feel _________(comfortable) when I put them on. 2. I am always nervous before the final __________(examine). 3.The city is small, but it is ______(fame)for its silk. 4.He used to be _________(power). 5.________ (wealth) person is always unhappy, so _______(wealth)doesn’t bring happiness all the time. 1. 由时间状语来判定 一般说来，各种时态都有特定的时间状语。与过去完成时连用的时间状语有： （ 1 ） by + 过去的时间点。 如： I had finished reading the novel by nine o'clock last night. 【即讲即练】 1. The shoes are too small for me. I feel _________(comfortable) when I put them on. 2. I am always nervous before the final __________(examine). 3.The city is small, but it is ______(fame)for its silk. 4.He used to be