Unit 4 Grammar课时课件- 2024-2025学年沪教版七年级英语上册

英 语 七年级上册 多媒体教学课件 ENGLISH 7A Unit 4 Smart homes Grammar in use Present perfect 2 Review the information about the Tech Expo. Think and answer 1 Q2 What does Lu Yao dislike about the smart home? Q3 Have you tried any smart devices in your daily life? It has not connected all smart devices. Q1 Have Lu Yao and Yiming seen the smart speaker at the Tech Expo? Yes,they have. How are the underlined parts formed? Read and think 2 (1) Look! The smart fridge has just changed temperature. (2) Smart homes have already changed our lives. (3) I’ve had a sore throat for two days. (4) But the smart home has not connected all smart devices. (5) Have you seen this smart speaker? The present perfect is formed with “have/has + past participle”. Learn about the form of the present perfect. Work out the rules 3 Learn about the form of the present perfect. Work out the rules 3 Notes: To form Yes/No questions in the present perfect, we put have or has before the subject. 构成现在完成时的一般疑问句时，助动词have/has置于主语之前。 Learn about the past participles of verbs. Work out the rules 3 (1) Past participles of regular verbs are the same as the past form. 规则动词的过去分词与其过去式相同。 Learn about the past participles of verbs. Work out the rules 3 (2) Past participles of irregular verbs are sometimes the same as the past form, but sometimes different. 部分不规则动词的过去分词与过去式相同，部分则不同。 Do we know exactly when it happened? ▢ Yes ▢ No Is there a result now? ▢ Yes ▢ No Tick (√) the one(s) you agree with. Work out the rules 3 √ (1) Look! The smart fridge has just changed temperature. √ Did the situation begin in the past? ▢ Yes ▢ No Does the situation still continue now? ▢ Yes ▢ No Tick (√) the one(s) you agree with. Work out the rules 3 √ (2) I’ve had a sore throat for two days. √ Learn about the rules. Work out the rules 3 Notes: 1. We use the present perfect to talk about the present result of an action completed at an unspecified time in the past. 现在完成时用于描述过去不明确时间所发生动作的结果。 2. We also use the present perfect to talk about actions and situations that began in the past and continue now. 现在完成时也用于描述始于过去，到目前仍持续的动作或状态。 Present perfect Find out the differences between the present perfect and the simple past. Work out the rules 3 (1) He has been to the Tech Expo. (2) He went to the Tech Expo last week. (3) She has already tried new devices. (4) Firstly, she visited the smart home, and then she tried new devices. (5) I have had a sore throat for two days. (6) I had a sore throat two days ago. Notes: The past simple talks about an action completed at a specific time (or during a period of time) in the past, as in (2) and (6). 一般过去时用于描述过去某个明确的时间点或时间段内发生的动作，如例句（2）和（6）所示。 Find out the differences between the present perfect and the simple past. Work out the rules 3 (1) He has been to the Tech Expo. (2) He went to the Tech Expo last week. (3) She has already tried new devices. (4) Firstly, she visited the smart home, and then she tried new devices. (5) I have had a sore throat for two days. (6) I had a sore throat two days ago. Notes: The past simple talks about specific past details, as in (4). 一般过去时用于描述过去发生的具体细节，如例句（4）所示。 Find out the differences between the present perfect and the simple past. Work out the rules 3 (1) He has been to the Tech Expo. (2) He went to the Tech Expo last week. (3) She has already tried new devices. (4) Firstly, she visited the smart home, and then she tried new devices. (5) I have had a sore throat for two days. (6) I had a sore throat two days ago. Notes: The present perfect talks about an action when the time is not important but the result of this action is important, as in (1) and (3). 现在完成时用于描述发生时间不重要，但结果很重要的动作，如例句（1）和（3）所示。 Find out the differences between the present perfect and the simple past. Work out the rules 3 (1) He has been to the Tech Expo. (2) He went to the Tech Expo last week. (3) She has already tried new devices. (4) Firstly, she visited the smart home, and then she tried new devices. (5) I have had a sore throat for two days. (6) I had a sore throat two days ago. Notes: In sentences with for, the present perfect talks about an activity that began in the past and continues to the present, as in (5). 句中含有“for”的现在完成时用于描述始于过去并持续到现在的动作，如例句（5）所示。 Talk about what Lu Yao and Wang Yiming have and haven’t done at the Tech Expo using the information in the picture. Practice: Make a conversation 4 Has Yiming visited the smart home? Yes, he has. Lu Yao has just/already visited the smart home too. Talk about what Lu Yao and Wang Yiming have and haven’t done at the Tech Expo using the information in the picture. Practice: Make a conversation 4 (Answers may vary.) A: Has Yiming tried new devices? B: Yes, he has. But Lu Yao hasn’t tried these new devices. A: Has Yiming made a smart thing? B: No, he hasn’t. Lu Yao hasn’t done that, either. Ask your partner questions and find out whether he or she has done the following things. Pair and share 5 (1) Find out if your partner has ever: heard about a smart __________. bought used broken ... Ask your partner questions and find out whether he or she has done the following things. Pair and share 5 (2) Listen to your partner. If his/her answer is Yes, ask questions for more information like: When did you ...? What did you ...? How did you ...? Ask your partner questions and find out whether he or she has done the following things. Pair and share 5 (3) Take turns asking and answering questions. (Answers may vary.) A: Have you ever heard about a smart tap? B: Yes, I have. A: How did you hear about it? B: I heard about it through an advertisement online. HOMEWORK Complete the exercises on page 56, Workbook 7A. 21 $$