2018秋外研版高中英语必修1 Module 4 教学课件：Period Three Grammar(共18张).ppt

Module 4 A Social Survey— My Neighbourhood  Period Three Grammar Present perfect tense Revision: Past tense time expressions: yesterday, last night, (week, month, year…) a few days ago, five years ago, …ago, in 1974, in the 1920s the other day, in the past Grammar : Present perfect tense I. 现在完成时构成：has / have + done… Activity 1 on P34. 2. Study these sentences: 1). --- Has the plane arrived? --- Yes. --- When did it arrive? --- Half an hour ago. 2). He is not in. He has gone to town. He just left before you came. 1. 动作发生在过去对现在的影响或结果。 2. 过去积累到现在的经验或经历。 3. 过去的动作和状态一直延续到现在。 I have had my breakfast. I have lost my dictionary. I’ve been to Tokyo twice. I had my breakfast and now I am full. I lost my dictionary and I don’t have it now. So it leaves me a deep impression.(ever, never twice, many times) 1) I have visited some beautiful cities. I visited Dalian this summer. 2)—Would you like to have here? —No. Thanks. I ________ lunch already. I ____ it in the school canteen. (have) have had had 一般过去时和现在完成时 1. 一般过去时表示具体的过去发生的动作，和现在时间无关, 纯属过去。 现在完成时包含过去和现在，强调过去和现在的联系。 2. 一般过去时常和表示过去某时刻的时间状语连用，且这个时间与现在相隔离。 现在完成时所带的时间状语包含说话时在内或与说话时非常接近。 1) --- When did you come? --- I came the day before yesterday. 2) I have learned 300 words this year. 3) He _____ the book 3 years ago. (write) 4) They ____________ many high-rise buildings in the last 10 years. (put up) wrote have put up 3. 一般过去时和时间段连用，只指过去的动作或状态在过去延续了多长时间，与现在无关。 现在完成时与时间段连用，表从过去开始的动作或状态延续至今。 I __________ English for four years. I _________ English for four years when I was at college. have studied studied I began to study it 4 years ago. And it lasts until now. Maybe I am not studying it now. Decide which sentences describe events that continue over a period of time. describe events that happen at a particular point in time. 1. And you’ve lived here all your life… 2. I’ve worked for it for four years now 3. …we’ve started a holiday club for children. 4. A lot of children have join