新概念英语青少版课件-2B Unit 21 The weather forecast(共32张PPT)

Unit 21 The weather forecast Revision Warming--up New lesson Practice Summary Teaching contents Warming up W a r m i n g - u p 1.Greetings: Hello, boys and girls! Nice to see you again. 2. Learn a song. T: What's the weather like today? revision Revision 规则动词过去式的构成。 1）变化规则： 动词变化很好记，一般末尾加-ed; 如果词尾有个e，紧跟其后加个-d； 辅音加y来结尾，变y为i加-ed； 单元+单辅，双写辅音加-ed 注：特殊变化要熟记。 2）读音规则： 清后[t]，元浊[d]，[t],[d]后读[id] Revision 过去时的句子变化口诀： 过去时，时过去。 过去时态是否是，过去时间是标志。 否定句很简单，did 之后not添。 疑问句也不难，did置于主语前。 过去置于动词前，谓语动词需还原。 New lesson What is she talking about? Listen! The weather forecast snowy cloudy sunny rainy forecast v.预测，预报 ['fɔ:kɑ:st] forecaster n.预报员 announcer n.播音员，节目主持人 [ə'naunsə] go over to 转到 the next few… 接下来的几个…… 在接下来的几天天气将要变化。 The weather will change in the next few days. wind n.风 [wind] blow v.吹 She’s blowing the dandelion. [bləu] south west [ˌsauθˈwest] n.西南 N S W E west north east south From today , the wind will blow fro