Lesson 1 Have you returned the book?
hold experiment maths physics chemistry biology geography subject term
拿，握住，举行 实验 数学 物理 化学 生物 地理 题目，学科，主语 学期
He opened the door.
The door is open now.
He has opened the door.
moved here hadin breakfast 2005
I’m not hungry now I still live here
我刚吃过饭。I have just had my breakfast. (现在我不饿) 2. 过去已经开始, 持续到现在的动作或状态 （常用延续性动词） 05年起我就住这。 I have lived here since 2005. (现还住这)
看 图 写 话
changed a lot China has___________ these years. given up Chenglong has _____
Air pollution has caused _______many problems.
bought I have ___________ a new car.
Complete the following sentences with the proper tense.
have studied (study) English for about 1 We _____________ five years. have lived 2 They ______________ (live) in the south since their daughter was born. have read (read) your article three times. 3 I ___________ It’s well written. has finished 4 The student _____________ (finish) her homework already. has sold 5 Eric _____________ (sell) his old house already.
主语 + 助动词have/has + 动词的过去分词.
I have finished the work. She has just arrived.
否定式: 主语 + 助动词have/has + not + 动词的过去分词. I haven’t finished the work yet. She hasn’t arrived yet.
疑问式： 助动词Have/Has + 主语 + 动词的过去分词? Have you finished the work? Yes, I have./ No, I haven’t. Has she arrived yet? Yes, she has./ No, she hasn’t.
按要求改写下列句子: 1) 2) We have visited the museum. (改为一般疑问句) They have seen the film. (改为否定句)
He has returned the book.
Jenny has already had her lunch. (改为一般疑问句并做否定回答)
? 现在完成时表示过去发生的某一动作对现在造成的影响或 结果，强调的是现在情况，所以它不能和表示过去的时间 状语连用，如：yesterday, last night, three weeks ago, in 1990等。而一般过去时只表示过去的动作或状态，和现在 无关，它可以和表示过去的时间状语连用。如： ? I have opened the door.我已经把门打开了。(现在门开着) ? I opened the door just now.我刚才开过门。(不涉及现在 门是否开着)
saw 1. I _______(see) this film yester
day. （强调看的动作发生过了） 2. I ____________ have seen (see) this film. （强调对现在的影响，电影的内容已经知道了） 3. He __________ has been (be) in the League for three years. （在团内的状态可延续） joined (join) the League three years ago. 4. He ________ （强调加入的动作发生在过去）
The past tense and past participle
work---worked---worked hope---hoped---hoped stop---stopped---stopped
study---studied---studied cut---cut---cut lose---lost---lost
come---came---come do---did---done break---broke---broken
have forgot has gone
haven’t found Has returned
haven’t posted have finished Has come came have did bought bought buy finished