八年级英语下册 Unit 1 Past and Present P3 Grammar课件 (新版)牛津版

to test your sense of observation to test your ability of short-term memory to test your ability to highlight the language points
Guess
Fill in the blanks.
Present Perfect Tense
Jim has proposed (求婚) to Ann.
语法讲解建议采用归纳法，如尽 可能多的呈现一些相关例句，或 可让学生从已学课文中找相应例 句，引导学生试着从所观察到的 语言现象中总结出语言规则和语 法规律。
Look at the following sentences.
Have / Has + 主语 + 过去分词 + …… Yes, 主语 + have / has. No, 主语 + have / has not. e.g. Have you finished the work? Yes, I have. / No, I haven’t. Has she arrived here? Yes, she has. / No, she hasn’t.
— You’ve changed too. You used to be so kind to me. (P6)
9. I’ve lived here since I was born. (P8) 10. Have you ever moved house? (P8) 11. …, my wife and I moved two blocks
already just
yet ever recently since
never for
1. already 已经，常用于肯定句中。
I have already seen the film. 我已经看过这部电影了。
2. yet 1) 已经，常用在疑问句中。
Has Linda read the book yet? 琳达已看过这本书了吗? 2) 还，仍然，常用于否定句和疑问句。
1. We _h_a_v_e_n_’_t_g_o_t_ much tea or coffee, and we _h_a_v_e_n_’_t_g_o_t_ any sugar or jam.
2. I_’v_e_ already _h_a_d_ my holiday this year. 3. _H_a_v_e_ your mechanics _f_in_i_s_h_e_d_ yet? 4. He _h_a_s_ always _b_e_e_n_ a good neighbour. 5. I _h_a_v_e_ just _a_r_r_i_v_e_d_ in Scotland and
1. 现在完成时的肯定句句型
主语（第一, 二人称单, 复数）+ have
（第三人称复数）
+ have
（第三人称单数）
+ has
e.g.
+ 过去分词
I have finished my homework.
He has written six poems.
Theyቤተ መጻሕፍቲ ባይዱhave seen that film.
I'm staying at a Youth Hostel. 6. H__a_v_e_ you _f_i_n_is_h_e_d_ already?
7. — Eddie, _h_a_v_e_ you _s_e_e_n_ my food? — Yes, I_’v_e_ just _e_a_te_n_ it. — What? You_’v_e__e_a_te_n_ my food? Why?
meet make sell give
met made sold given
fit
fitted
write written
plan planned think thought
规则动词的过去分词的构成
1. 大多数的动词的过去分词是规则的，只 需在动词后加-ed；例如： work→worked listen→listened jump→jumped visit→visited
2. 现在完成时的否定句句型 主语 + have / has + not + 过去分词 + ……
e.g. I have not seen the movie yet. He hasn’t e here yet. hasn’t = has not haven’t = have not
3. 现在完成时的一般疑问句句型
Despicable Me 2 with me tonight?
— I’d like to, but I ______ it twice.
A. see
B. will see
C. have seen D. am seeing
以上我们已经通过归纳总结和练习 对本课的语法内容有了一定的了解， 下面就让我们根据 之前练习的考察情 况进一步选择讲解 该语法项的重难点。
11. …, my wife and I moved two blocks away and we_’v_e__li_v_e_d_ in this area since then.
12. _H_a_s_ the town _c_h_a_n_g_e_d_ a lot over the years?
13. Now, the government _h_a_s_t_u_r_n_e_d_ part of the town centre into a new park.
Regular verbs
Irregular verbs
Base form Past participle Base form Past participle
visit visited
hit
hit
repair repaired put
put
live move try study
lived moved tried studied
B. worked
C. have worked D. will work
2. The book is very thin, but Jack thinks
it’s the best book that he ______.
A. read
B. has read
C. will read
D. reads
3. — Would you like to go and see
We use the present perfect tense to talk about an action that happened in the past and has a connection with the present.
Eddie has just eaten Hobo’s food. (Eddie ate the food, and now Hobo has nothing to eat.) I have lost my mobile phone. (I lost my mobile phone, and now I have no mobile phone to use.)
We also use the present perfect tense to talk about how many times an action has happened till now.
I have already read this book many times.
We can use these time expressions with the present perfect tense.
7. — Eddie, have you seen my food? (P6) — Yes, I’ve just eaten it. — What? You’ve eaten my food? Why?
8. — You’ve changed, Eddie. You used to share food with me!
away and we’ve lived in this area since then. (P8) 12. Has the town changed a lot over the years? (P8) 13. Now, the government has turned part of the town centre into a new park. (P8) 14. However, most of my old friends have moved away. (P9)
Grammar
Words review
yet recently
past
adv. 还，仍 adv. 近来，最近 adj. 过去的
Objectives
To learn to use the present perfect tense To learn to form the past participles of regular verbs To learn to form the past participles of irregular verbs
1. We haven't got much tea or coffee, and
we haven't got any sugar or jam. (新概念1 L79)
2. I've already had my holiday this year. (新概念1 L83)
3. Have your mechanics (机修工) finished yet? (新概念1 L87)
8. — You_’v_e__c_h_a_n_g_e_d_, Eddie. You used to share food with me!
— You_’v_e__c_h_a_n_g_e_d_ too. You used to be so kind to me.
9. I’_v_e_l_i_v_ed__ here since I was born. 10. _H_a_v_e_ you ever _m__o_v_e_d_ house?
14. However, most of my old friends _h_a_v_e_m__o_v_e_d_ away.
1. — You work in Luoyang, don’t you?
— Yes. I ______ in this city for three
years.
A. work
4. He has always been a good neighbour. (新概念1 L91)
5. I have just arrived in Scotland and I'm staying at a Youth Hostel (青年旅社). (新概念1 L101)
6. Have you finished already? (新概念1 L125)
He has not begun to work yet. 他还未开始工作。
3. ever 曾经，主要用于疑问句
Have you ever wanted to travel around
the world? 你曾经想要周游世界吗？ 4. never 从来没有，表示否定
He has never seen such a tall building. 他从未见过这么高的楼。 5. just 刚刚，常用于肯定句中
We use the present perfect tense to talk about an action that started in the past and continues to the present.
I have lived here since I was born.
He has lived here since he came to Nanjing.
I have just finished lunch. 我刚吃过午饭。
6. recently 不久前，最近 I haven’t seen them recently. 我近来没见过他们。 Have you used it recently? 你最近用过它么？
since, for的用法详见下单元语法课件。