Unit One Past and present Comic strip & Welcome to the unitLearning aims:1.learn something about transport at different times 2.Learn to talk about transport in the past and at present 3.Learn some basic language about present perfect tense( 现在完成时 )In the past,( 在过去过去 )it was a poor village. = It used to be a poor village. （过去经常做某事）At present, （现在） it becomes a rich city.Our living areas have changed a lot.What about Hobo and Eddie?1. What is Hobo looking for? He is looking for his food.2. Where is Hobo’s food? Eddie ate it.Listen and Listen and answer:answer: 1. Why did Eddie eat Hobo’s food? 2. Is Hobo happy?3. What does Hobo think of Eddie? 4. Why does Hobe think so? Read and Read and answer:answer:Because he was very hungry.No, he isn’t.He thinks Eddie is not kind now./He thinks Eddie has changed.Because Eddie was kind before.1. Eddie, have you seen my food?Eddie, 你看见我的食物了吗？（你知道我的食物在哪儿吗？）base form 原形simple past 过去式past participle 过去分词seesawseenhave/has + 过去分词[ 此结构为“现在完成时 (present perfect tense)”, 表示过去的动作一直延续到现在，或与现在有一定联系 ]Some key points( 要点 ):base form 原形simple past 过去式past participle 过去分词eatateeaten2. I’ve just eaten it. （ I’ve = I have) 我刚刚把它吃了。现在完成时 : have eatenbase form 原形simple past 过去式past participle 过去分词changechangedchanged3. You’ve changed, Eddie. (You’ve=You have)你（已经）变了。现在完成时 : have changedbase form 原形simple past 过去式past participle 过去分词seesawseeneatateeatenchangechangedchangeduseusedusedHave a try ！ (想一想，试一试 )现在完成时 :have/has usedbase form 原形seehave/has seeneathave/has eatenchangehave/has changedusehave/has usedHave a try ！ (想一想，试一试 )present perfect...
